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LAKE-WEALTH

THE MAPS OF LAKE AND ITS AFFLUENTS

THE RICHES OF LAKE I CARE ABOUT IT

Current conditions of the lake

RLB produces a regular report on the conditions that prevail in the lake. This data can be consulted  by anyone who is interested in learning about the quality of the lake.

Here are the latest readings taken by RLB (look at Secchi)

A bit more on this subject

 
 A good indicator of the health of the lake is the measurement of the clarity of the water. To achieve this, RBL regularly monitors the transparency of the water, using the black and white Secchi disck. A Secchi disk measures 8 inches in diameter and is alternately painted white and black. It is lowered into the water by rope  until it can no longer be seen; the depth thus reach is considered as a measure of the clarity of the water. 

According to recognized scientific protocols, this measurement must take place in the deepest part of the lake (along the bottom trench), between 10:00 and 15:00.

 Renaissance Brome Laker reports the information on a panel on-line for the benefit of all citizens who would like to personally evaluate the risks of cyanobacteria, starting with the measured quality of the water in the lake. It is a recognized fact that when transparency is less than 2 metres due to water full of sedimentation and colonies of blue-green algae, this is an indicator of a coming ”bloom” and that citizens should be on alert. However, when a body of water such as Brome Lake indicates a clarity depth of 3.5 – 4 metres, the possibility of an algae bloom explosion is unlikely. RBL does its rounds of the lake on a regular basis. 

Secchi readings are usually conducted at 7 to 10 day intervals, weather conditions permitting. For safety reasons, the planned dates are carried forward when there is a storm or violent winds. These readings can vary according to the  visual capacity of the observer, the degree of light, the presence of waves and even turbulence caused by rain or motor boat circulation.

The clarity of the water is commonly used as a global indicator of its quality (even if the measure is approximate). In the case of Brome Lake, any value exceeding 4 metres is considered to be very good. A reading of less than 2 metres frequently leads to a prediction of a looming blue-green algae bloom and this could result in the closing of the lake for reasons of public health.

We must ensure that the lake is not subject to a public health warning or a restricted use alert. Public health authorities can, on recommendation by the ministry of the environment and following negative water quality results, issue a public health warning. In this case, the lake may be partially or totally subject to a use interdiction (drinking water, swimming, any activity where contact with the water is involved, etc.) 

 
 

To find out more

History of lake conditions

The principal observations for the last 5 years (2006 to 2010)

2010

Localized algae blooms (South and North of lake, i.e. Bondville and Lakeside sectors) on June 21 and 22 which disperse (breaks apart) the following day.  August 1 shows a category 2a blooms in several sectors, including Douglass beach forcing a 24-hour closing. The bloom breaks apart the same day. A new category 2a bloom appears in the north sector and breaks down the same day but there is a murky water column. Generalized water flowers (green) are seen on September 3-4-5 which disappear September 7. The water flower returns on September 7.

2009

There is no warning made or restrictions issued for the period mid May to mid August despite some localized cyanobacteria blooms in July and August.  There are generalized water flowers noticed covering the entire lake from mid August onward.  The lake was closed on September 25 and reopened on October 19, with the results in terms of toxicity for the first time superior to norms allowed for both drinking and swimming.

2008

No warnings or use restrictions issued for the period May to mid September. Localized blooms are seen at the end of June and the beginning of August. Toxicity levels are below norms. 

2007

 2 warnings issued as well as a notice of closing of public beaches between July 30 and August 17. Toxicity levels remained below norms.

2006

The lake is the subject of a public health warning  (subsequently closed) on August 17, 2006 and this restriction remained in force until the end of the season. The ministry has since modified its procedures since that time. The toxin level was virtually non existent.

 

To find out more

La transparence de l’eau : les données historiques des lectures Secchi des années précédentes

WATER QUALITY MONITORING

 

Renaissance Brome Lake has been monitoring the water quality of the lake’s tributaries since 2005. Over the years several thousand tests have been conducted at various strategic locations in the watershed, on the tributary territories of South Stukely, West Bolton, Canton de Shefford, St-Étienne-de-Bolton and, finally, Ville de Lac-Brome itself.

In 2014, Renaissance will rationalize its monitoring program and limit the process to six stations all of which are located in the delta of the principal tributaries, Quilliams, McLaughlin, Argyll, Coldbrook, Pearson and Inverness brooks. This represents the minimum standard to evaluate the evolution of the phosphorous content and other suspended materials in the lake.

The attached map indicates the location of the stations where the water samples will be taken, a process which will consist of eight outings starting in March 2014 and run until November 2014. This effort will allow us to learn about the phosphorous content and suspended materials during the spring thaw, the summer season and the fall rains

Secchi

A good indicator of the health of the lake is the measurement of the clarity of the water. To achieve this, RBL regularly monitors the transparency of the water, using the black and white Secchi disck. A Secchi disk measures 8 inches in diameter and is alternately painted white and black. It is lowered into the water by rope  until it can no longer be seen; the depth thus reach is considered as a measure of the clarity of the water. 

According to recognized scientific protocols, this measurement must take place in the deepest part of the lake (along the bottom trench), between 10:00 and 15:00.

 Renaissance Brome Laker reports the information on a panel on-line for the benefit of all citizens who would like to personally evaluate the risks of cyanobacteria, starting with the measured quality of the water in the lake. It is a recognized fact that when transparency is less than 2 metres due to water full of sedimentation and colonies of blue-green algae, this is an indicator of a coming ”bloom” and that citizens should be on alert. However, when a body of water such as Brome Lake indicates a clarity depth of 3.5 – 4 metres, the possibility of an algae bloom explosion is unlikely. RBL does its rounds of the lake on a regular basis. 

Secchi readings are usually conducted at 7 to 10 day intervals, weather conditions permitting. For safety reasons, the planned dates are carried forward when there is a storm or violent winds. These readings can vary according to the  visual capacity of the observer, the degree of light, the presence of waves and even turbulence caused by rain or motor boat circulation.

The clarity of the water is commonly used as a global indicator of its quality (even if the measure is approximate). In the case of Brome Lake, any value exceeding 4 metres is considered to be very good. A reading of less than 2 metres frequently leads to a prediction of a looming blue-green algae bloom and this could result in the closing of the lake for reasons of public health.

We must ensure that the lake is not subject to a public health warning or a restricted use alert. Public health authorities can, on recommendation by the ministry of the environment and following negative water quality results, issue a public health warning. In this case, the lake may be partially or totally subject to a use interdiction (drinking water, swimming, any activity where contact with the water is involved, etc.) 

 
 

To find out more

Secchi

Date of statement: 24-05-2020

ConditionOpen

Transparency5,12

Temperature15.3

Risk of bloomLight

Other Comments: Clarity excellent

Depth: 5,12 Meters

Cyanobacteria, what are they?

 

 

 

 

Cyanobacteria are micro-organisms which are half way between bacteria and algae. Like bacteria, cyanobacteria   is microscopic. Like algae, it possesses pigments which permit photosynthesis (chlorophyll is responsible for the   green colour).

 It is important to note that cynanobacteria are not aquatic plants.

Cyanobacteria develop during the summer in shallow, tepid, calm and nutrient-rich waters (containing phosphorous and nitrogen).
Cyanobacteria are not always visible on the surface because they are frequently disseminated in the water column. Generally speaking, they become visible when they are bunched together in the same place. In this case, we can observe a blue-green colour in the water or on the surface. Eventually a green scum (or foam) forms on the surface of the water. While wind, waves and current tend to disperse them they may reappear. Bunches of cyanobacteris may sometimes be accompanied by disagreeable odours.
The problem of bodies of water being affected by cyanobacteria exists throughout the world and that includes some lakes in the Eastern Townships including the Montérégie and Estrie sectors as well as elsewhere in Quebec.

Let us remember that cyanobacteria are at the origins of life and have been present on our planet for some 2.5 billion years. The problem is their too large numbers due to human activity which perturbs the natural balance.

There are more than 2000 species of cyanobacteria in existence of which some 300 have been identified in Quebec. Of these 300 species, about 50 can produce toxins which can provoke health problems.

To find out more

Algae vs cyanos

 

Many of you have recently reported the presence of unknown vegetation growing along the shoreline. It is easy to confuse filamentous algae, aquatic plants and cyanobacteria.  The proliferation of these types of “vegetation” is certainly the sign of a productive watercourse that is chock full of nutrients. All this vegetation is a good indication of the ecological state of a watercourse.  

Filamentous algae appears in many ways: it is hairy and accumulates in mats or scummy mass, sometimes resembling moss and can cause small cushions or rugs, none of which are inviting to swimmers. Some even resemble gelatinous nets that can be lifted with a stick or by hand. They are not noxious to your health and can simply be removed from the water.  

Hot weather and stagnant water enhance their development. They are particularly abundant at the beginning of the summer season because they are the first to feed on the nutrients in the water.  These algae generally represent a short biological cycle influenced by the quality of the water and the aquatic habitat. Certain species of filamentous algae can even exist during the winter months in  a vegetative state, like cyanobacteria.  

Filamentous algae can be found attached to many types of surfaces: rocks, branches, sand beds, etc., in depths ranging from a few cm to a full metre. They can also develop in a stagnant water pool and float freely. Because of the effects of currents and winds, they can move to certain areas such as the backs of bays.  

Algues filamenteuses et plantes aquatiques

 

When it comes to aquatic plants, RBL has published a brochure that illustrates several examples of immersed, emerging or floating plants. Aquatic plants possess roots, stems and leaves. They grow throughout the season. Boat propellers chop them up and help them spread and replant. Direct sun and warm water have great influence on waves of algae  and the development cycles of different species.  Please also note that filamentous algae and aquatic plants are frequently found joined together in the same vegetation mass as the adjoining photo indicates. 

To conclude, let’s talk about cyanobacteria. These organisms are closer to bacteria than algae. They are semi-bacteria and microscopic (not visible to the naked eye); they are semi-algae because they are capable of photosynthesizing like filamentous algae and aquatic  plants. Cyanobacteria live in the water table. Many species are capable of moving vertically to get maximum benefit from available nutrients and light. On the water surface they can form green trails of vegetation. A bloom is made up of millions of cyanobacteria accumulated in the water table, giving it a green colour.

This green colour is due to the chlorophyll content found in the cyanobacteria cells. A deposit of scum along the shoreline or on the water surface is an indication of a large concentration of accumulated cyanobacteria from the effects of the wind and waves. To the eye, it is either a brocoli soup or green paint that generally appears toward the end of the summer season even though they can be found in any locality at any time.  Any contact with the scum should be avoided because the cyanobacteria can cause irritation to the skin, mucous membranes and bring on gastro-enteritis. As well, some species may contain toxins that are considered a health nuisance

Algae blooms

When cyanobacteria reproduces in large quantities, we witness a substantial bloom of water flowers. This flower bloom corresponds with a substantial cyanobacteria density that is enough to be visible to the naked eye. 
Quebec’s ministry of sustainable development, the environment and parks (MDDEP) has come up with a characterization system for cyanobacteria. They consider that category 1 is a column of water loaded with numerous green or blue-green particles without the global transparency of the water being too much affected. 
 
There is a 2a category in which we can observe medium to high density where particles are distributed in the water column. Here we could say that the water resembles a broccoli soup, green paint and that it contains aggregates of flaky filaments or threads. In this situation, water transparency has been greatly reduced. 
Finally, we have a 2b category when there is scum on the water surface, which confirms that the density of the cyanobacteria is very elevated. This slimy substance can look like  a paint spill, present itself in the form of a condensed green streak or a surface film, usually near the shore line.
 

The Identifier

Source : Protocole de suivi visuel d’une fleur d’eau d’algues bleu-vert, Protocole élaboré dans le cadre du Réseau de surveillance volontaire des lacs (RSVL), Juillet 2008, édition 2 : mai  2009

Illustration of different catergories

To find out more please visit

Public health notices

 

 

 

Cyanobacteria can produce toxins, called cyanotoxins. When there is a flower bloom with sludge, the quantity of cyanotoxins is likely to be problematical. There are three types of toxins:

  • dermatotoxins (affects skin and mucous)
  • hepatotoxins (affects the liver)
  • neurotoxins (affects the brain)

The most frequent problem to emerge is skin irritation following bathing. The ingestion of contaminated water can, in the long run, affect the liver or the brain. That is the reason for which the public health authorities, when faced with a situation of large quantities of cyanobacteria, issue their public warnings. 

Following a report by a citizen, a beach operator or a municipality, the MDDEP quickly dispatches a technician to take water samples for laboratory analysis. If it involves a beach the operator must, if he or she observes a bloom, close the beach or the affected sector immediately, including a safety zone of 3 metres from the bloom or sludge area.  He or she must also advise the MDDEP. The beach operator may also independently open the beach 24 hours after the bloom has disappeared. If the situation persists for more than 72 hours however, he or she must recontact the MDDEP.

Most of the time the lab results will confirm the degree of cyanobacteris present and its toxicity level within 48 hours. In these situations, the public health directorate, on recommendation of the MDDEP, will issue a public health advisory establishing the level of restricted use (boating activities, fishing, drinking water, etc.) for a particular sector or for the entire lake. The citizens will be immediately informed via a written notice from the municipality. 

It will be up to the public health directorate to lift the advisory notice in the following days, weeks or months, all of this following subsequent water analysis.

To find out more

In case of symptoms

If you develop symptoms following contact with water containing cyanobacteria, immediately cease any contact with the water.

Rinse your skin with proper water. If this takes place at a public beach, immediately inform the person in charge.

If the symptoms persist or if your state of health worries you, immediately dial the Info-Santè number (811) or contact your family doctor. 

Note that the symptoms found below can be brought on by other than cyanobacteria  (for example: fecal materials in the water or bather dermatitis).

Through direct contact

  • Irritation of the skin
  • Irritation of the nose
  • Irritation of the throat
  • Irritation of the eyes.

 

Through ingestion

  • Stomach ache
  • Diarrhea
  • Vomiting
  • Nausea

 

More rarely:

  • Vertigo
  • Headache
  • Fever
  • Liver damage
  • Damage to the nervous system

Phosphorus

Phosphorous (P) is the determining element for cyanobacteria proliferation. To avoid water degradation, it is essential to diminish the content of phosphorous.
Nature does an efficient job with the limited amount of phosphorous it naturally contains. The contribution is essential to the growth of living organisms such as nitrogen  (N) and potassium (K).
Unfortunately, human activity perturbs the natural phosphorous cycle with the result that too much phosphorous finds itself in the water courses, modifying the natural balance  and creating a situation where the biomass (aquatic plants, cyanobacteria, etc.) finds itself abnormally stimulated (we frequently speak of a ratio of 1 for 500, that is to say 1 kg of phosphorous can bring on the production of 500 kg of biomass). We could say that the lake is too productive and that its ageing process is accelerating (eutrophication).
Figure 1 shows the principal sources of phosphorous which contaminate the water bodies and lakes.
L’examen de cette figure fait ressortir:
  • Le phosphore peut être particulaire ou soluble (dissous). La plupart du temps (70% à 90%), il est particulaire et s’attache aux particules fines du sol, lesquelles sont entraînées par le ruissellement des eaux vers les cours d’eau.
  • Les sources de production de phosphore sont nombreuses et la plupart du temps anthropiques (par l’homme).
La figure 2 montre les principales sources d’entrées de phosphore dans le lac. Ajoutons que les sédiments déjà présents dans le lac contiennent de grandes quantités de phosphore, résultats de l’insouciance passée. Ce phosphore, selon certaines conditions, peut être relâché dans la colonne d’eau et redevenir disponible pour les plantes et les algues. Cette source importante au lac Brome pourra être éventuellement diminuée si les apports par le bassin versant sont radicalement réduits et si le lac parvient à « reprendre le dessus » (par le processus de renouvellement de l’eau qu’on sait être de 10 mois au lac Brome et par l’évacuation à l’exutoire).
RLB a comme cible stratégique de réduire de 50% l’apport de phosphore dans le lac sur 5 ans soit 10 % par an. Le plan d’action de RLB pour réduire le phosphore

Les fertilisants aux fins esthétiques, INTERDITS!

Toutes les municipalités du bassin versant doivent faire en sorte qu’il soit interdit d’épandre tout fertilisant
sur les pelouses. Ville de Lac-Brome a déjà adopté une telle mesure dès 2010 En 2011, les terrains de golfs de la municipalité seront assujettis au même règlement.

Pour en savoir plus:

Les sources de phosphore, article par Peter F. Wade

Tableau comparatif des concentrations en phosphore pour les principales marques de savon pour lave-vaisselle.

Les fertilisants, l’eau du lac et de ses affluents, RLB, 2008

Dossier de CAA-Québec “Infestations d’algues toxiques : comment les éviter?”

Stormwater Management (French)

 Gestion des eaux de surface: difficile de passer de la parole aux actes!

Renaissance lac Brome (RLB) a participé lundi le 18 août 2014 à la réunion de consultation publique sur la gestion des eaux de surface organisée par la MRC Brome-Missisquoi.

Si tous s’entendent sur la nécessité de mieux gérer les eaux de surface, notamment à cause de l’érosion et des dommages aux infrastructures publiques et privées qu’entraînent les coups d’eau, il est clair que les initiatives concrètes demandent beaucoup de concertation et de courage politique.

RLB est particulièrement déçue de la timidité des mesures proposées en matière de bandes riveraines et de protection des sommets montagneux. Par contre, certaines initiatives méritent d’être saluées, notamment la protection des couverts boisés et les mesures pour favoriser l’infiltration de l’eau sur les terrains.

Espérons que la MRC et les maires sauront prendre les mesures audacieuses qui s’imposent et feront de la MRC un leader dans le domaine de la gestion du ruissellement, facteur essentiel à la qualité de l’eau de nos lacs et cours d’eau. D’autres MRC l’ont fait.

Voir le document présenté par Renaissance lac Brome.

Erosion and sedimentation

 

Erosion is the action of wind, water or ice moving soil particles. The sensitivity of a soil to erosion depends on the climate, the relief, the presence of vegetation and the nature of the material.

The health of a lake is the result of the health of its watershed. The quality of the water is not only the affair of the residents of the lake but of all those who live near a watercourse (ditch, stream, etc.) that empties into the lake. .

Our worst enemy is phosphorus. Each year, tributaries discharge too much phosphorus into the lake especially in the spring. Phosphorus is driven by sediments in runoff. The phosphorus inputs from the tributaries are high and accumulate at the bottom of the lake each year! This is about the equivalent of 100 sediment trucks that dump into the lake, contributing to its premature aging (eutrophication).

Climatic conditions have a great influence on the quality of the water. Unfortunately, these conditions are uncontrollable. On the other hand, the extreme events which will be more and more frequent (because of the global warming)
must be better managed because they are the ones that are most damaging to the lakes.

The first factor of success is certainly the management of runoff water, especially during the development of street ditches, drainage ditches, dirt roads, bare floors (during all kinds of constructions). Countering soil erosion is a top priority that can be easily accomplished.

To know more

Rainwater Management Guide, MDDEP, 2010

Septic systems

Septic tank installations near water courses represent a potential source of contamination. Solutions adapted to each context must be studied and implemented according to the risk factor involved, the technological possibilities and the costs of placing it in the ground and operating it.

In 2009, RBL carried out an exhaustive study of septic installations on the Ville de Lac-Brome territory. This study revealed the following:

1. 1682 individual residential installations, excluding sealed tanks, were 100% used on the  Ville de Lac-Brome territory;

2. Of this number, 776 septic installations (46.1%) are situated in the watershed; they possibly have an impact;

3. The MDDEP considers an individual septic installation to be “neutral” if it is more than 300 metres away from a body of water. It is estimated that on the  Ville de Lac-Brome territory,  more than 80% of the properties are located less than 300 metres from a body of water;

4. 249 isolated residential septic installations are found along the shoreline (of 403 lakeside properties excluding businesses); the other shoreline properties are served by the municipal sewage system, mainly in the town of Knowlton itself. Of these 249 installations, 70.7% do not respect the minimum surface required by the law (4,000 m² for any building less than 100 metres from the lake).

Concrete proposals were formulated to be presented to all citizens encouraging them to keep their septic installation well maintained and used. Other than these elementary precautions, precise recommendations were sent to Ville de Lac-Brome for such sectors as Fisher Point, the sector north of chemin Lakeside, the village of Foster and the Rock Island Bay sector.

In its 2011 strategic development plan, Ville de Lac Brome states that it will conduct feasibility studies on the sewage systems in the Foster and Rock Island Bay sectors.

 

New:  Quebec adopted a new tax credit in the 2017 budget which refunds 20% of the cost exceeding $2,500 when an existing septic system is brought up to code.  (Note that this credit is “refundable” which means that it can be paid even if the property owner does not have provincial tax to pay.)  For more details, consult the link below. 

 

To learn more

Agriculture

Why ask those who live along the shoreline and next to other bodies of water to respect a buffer zone of 10 to 15 metres while those who conduct agricultural activities are only required to respect a strip of 3 metres (including a minimum of one metre on a slope) and spread a great deal of manure? How is it that in certain cases the manure spreading exceeds what is allowed and in other cases the spreading is carried out beyond the allowable dates in the fall, sometimes even before heavy rains? We should be much more aware of the soils, the topography of lands and of the general support capacity of the area in question and the forecasts for rain. 

 

What is the logic in asking citizens to renaturalise their shorelines when not so long ago we witnessed 100s of hectares of forest being cut to create fields for spreading pig manure? Shouldn’t the use of new techniques to dispose of pig manure be accentuated on the condition that the capacity of each drainage basin be respected in terms of animal units? 

When we talk about shorelines, there are already solutions which permit spectacular results. For example, the hybrid poplar is a veritable phosphorous pump, grows extremely quickly and can be harvested after a mere few years. However, as long as this type of planting along an enlarged shoreline surface takes place, it will be in opposition to existing subsidized planting, in particular corn which is very harmful to water. It is therefore unlikely that we will progress toward the protected shorelines which are worthy of the name.   

The agricultural industry can be mobilised to do its part and also contribute to a better quality of water in our region. They now face a host of governmental regulation to this effect. These are practical people who for the most part ask no more than to be able to employ sound environmental practices on their lands.  In our region some farmers have signed up for the Prime-Vert (doing it green) program. But it is unfolding too slowly. Everybody would be in a winning situation if the bureaucratic requirements were simplified and the numerous government agencies (MAPAQ, MDDEP, Pêches et Océans, Ressources Naturelles et de la Faune, MRC) were better coordinated.

Regulations

There are a large number of organizations and regulations to protect water. Do not take the risk of compromising the environment and being in breach: contact your municipality before any work near a watercourse. Brown water is not normal. The shores and shoreline of a watercourse and wetlands are sacred; we can not alter them. Make sure your contractor (turf maintenance, tree cutting, excavation, etc.) fully complies with the regulations.

 

 

Your municipality has a zoning plan and regulations for water quality
Naturalization and protection of riparian strips
Measures to control erosion
The use of pesticides and fertilizers
Maintenance of septic installations
Protection of wetlands and streams
You must have a license
Before cutting down trees, developing an artificial lake, installing a drainage system or intervening on the shoreline, the coastline or in a wetland, etc., you must consult your municipality.

For renovation and works
Entrepreneurs, before intervening near a lake!

Implantation of a lawn on a new property

Zoning by-laws
Zoning by-laws in TBL

West Bolton web site

Urban Plan

The Master Plan is an essential tool to help improve the water quality of the lake and streams.

Indeed, it is in the urban plan and especially in the zoning bylaw that the development rules are specified. It is these rules that citizens, landowners and contractors must follow in any project affecting the territory: building, development, roads, wetland interventions, forestry, etc.
In fact, the urban plan is operationalized for a series of regulations that citizens must respect and that the planning department must apply. The most important of these regulations is certainly the zoning bylaw. There are other important and complementary regulations such as the permit bylaw, the subdivision bylaw and the comprehensive development plan bylaw.
In 2009, RLB prepared a comprehensive document on the urban reality of Ville de Lac-Brome. On this occasion, RLB made several recommendations to be included in the Master Plan. This document, Sustainable Use of Land (UDT) can be accessed by anyone.

Important elements include:
the rules concerning the waterproofing of soils
the rules concerning the management of rainwater runoff
the rules concerning field dimensions and siting margins
the rules concerning buildings, main or accessorie
the rules concerning the protection of sensitive environments, wetlands and woodlands
the permitted uses for each zone of the territory

The urban plan is part of a cascade of land management tools that originate from major government policies. Each RCM must then develop its development plan, from which the town planning and zoning by-laws of each municipality derive, all of which must constitute an integrated and coherent set of development rules. The revision of each of these plans is done on a five-year basis.

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Renaissance lac Brome bénéficie du soutien financier de plusieurs organismes. Sans eux, plusieurs projets ne pourraient voir le jour. Ce sont principalement:

La mise en place de projets afin d’améliorer la qualité de l’eau repose sur la collaboration de plusieurs intervenants. Divers ministères du gouvernement du Québec interviennent par :

  • des règlements sur les installations septiques ;
  • le suivi des plans d’eau contaminés ;
  • l’attribution de montants pour des projets pilote (gestion du ruissellement, le contrôle de l’érosion ou de    stabilisation des berges).

La MRC Brome-Missisquoi a la responsabilité d’établir une politique de gestion des cours d’eau et d’en faire le suivi.

Les municipalités de Bolton-Ouest, du Canton de Shefford, de Stukely-Sud et ville de Lac-Brome adoptent des règlements concernant l’amélioration de la qualité de l’eau :

  • La naturalisation et la protection des bandes riveraines
  • Les mesures visant le contrôle de l’érosion
  • L’utilisation des pesticides et les engrais
  • L‘entretien des installations septiques
  • La protection des milieux humides et des cours d’eau

Sites Internet officiels

Ville de lac Brome

Ministère du Développement Durable, de l’Environnement et des Parcs

MDDEP, section Algues bleu-vert

Agence de la santé et des services sociaux de la Montérégie

MRC Brome-Missiquoi

Fédération Québécoise des Municipalités (FQM)

Apiculture Sirois

Organismes environnementaux

OBV : Organisme du bassin de la Yamaska

ACBVLB – Association de conservation du bassin versant du lac Bromont

CSBVLD – Comité de sauvegarde du bassin versant du lac Davignon

ABVLW – Amis du bassin versant du lac Waterloo

ACA – Corridor appalachien

COGESAF : Comité de gestion du bassin versant de la Rivière Saint Francois

RAPPEL : Regroupement des Associations Pour la Protection de l’Environnement des Lacs et des cours d’eaux de l’Estrie et du haut bassin de la rivière Saint-François

ROBVQ : Regroupement des Organisations de Bassin Versant du Québec

Fondation Rivières

Coalition Eau Secours!

Greenpeace

Entreprises locales