Water

Water Filtration Plant

The Municipality of Casselman draws its water from the South Nation River and treats it in its filtration plant to make it drinkable. We treat and produce drinking water that meets provincial and federal standards from both Ministries of the Environment. The water from the treatment plant and the distribution network is continually analyzed and tested by the municipality as well as an external laboratory to guarantee water quality.

Production Capacity

The Municipality of Casselman's plant produces an average of 1,350 m³ of drinking water per day for a population of more than 4,000 residents. This production can almost double during periods of high demand. The average consumption of water for Casselman residents is 352 liters per day, per person. On average, each Canadian uses approximately 329 liters of water per day at home alone.

Water Filtration and Treatment 

Controlled chemicals are used in the water treatment process. However, we use the lowest amount of products necessary for effective treatment.

• Controlled chemicals are used in the water treatment process. However, we use the lowest amount of products necessary for effective treatment.
• Aluminum sulfate (alum) is used to remove impurities and harmful microorganisms by amalgamating the particles into parts large enough to be filtered.
• Potassium permanganate is used to treat the presence of minerals in the South Nation River.

The smell and taste of your drinking water can sometimes change during snowmelt and summer months due to the natural presence of algae and higher water temperatures in the South Nation River. However, the quality of the treated water remains the same and is confirmed by numerous quality controls. We are continually working to reduce and eliminate these seasonal inconveniences.

Cleaning of the distribution network (Flushing) 

The water distribution network is regularly cleaned to remove impurities, sediments and clogging present in the pipes through the standpipes. This technique is also used before the commissioning of pipes in new residential projects.

The municipality of Casselman notifies residents before carrying out maintenance and cleaning work on the distribution network. Even if it causes some inconvenience, this work is necessary to maintain our network in good condition and continue to offer you superior quality water.

The variation in water pressure and velocity during network cleaning can disturb sediment deposited in the pipes. Your tap water may then take on a reddish or brownish color.

• During cleanings, we ask that you reduce your consumption and not use hot water in order to better control sediments that could enter your system and your hot water tank.
• After a cleaning period, please let cold water run for a few minutes before using.

In the event of an emergency, the Municipality of Casselman can clean the system without notice.

Domestic devices for water treatment 

Household water treatment devices and bottled water are not subject to the same laws and regulations as your municipal drinking water. Most of these devices are designed to treat water that is already safe for consumption.

There are several types of devices designed for different purposes. For example, some devices are designed to eliminate residual chlorine, while others are used to soften water or eliminate odors.

Improper use or maintenance of a home treatment device can lead to the formation of harmful chemicals or high levels of bacteria in your water.

It is important to carefully understand your needs before purchasing a device and ensure that it is NSF approved. To learn more about the different types of devices, visit NSF International. 

As of August 12th 2025

RESTRICTIONS ON OUTDOOR WATER USAGE IN CASSELMAN

The lack of rain and very hot temperatures have forced the Municipality of Casselman to impose a complete ban on outdoor water use until further notice.

It is still possible to water your garden and flowers with a hand-held watering can.

The water park will be closed starting today. 

This ban is intended to promote responsible potable water consumption and reduce pressure on the City's infrastructure.

The risk of fire remains high in the area and sufficient water supply is critical to fighting all types of fires. 

The low precipitation over the past few weeks has contributed to a reduction in the flow of watercourses in the South Nation River watershed. Several upstream tributaries are completely dried up, prompting South Nation Conservation to issue a Level 2 low water advisory.

INFORMATION:

For General Information: 613-764-3139   (Reception)

For Construction Related Issues or exceptional situations requiring special permission to water: 613-764-3139 x 243   (Public Works)

For Media Inquiry: 613-764-3139 x 202    (Communications)

The billing process for water and sewerage charges is detailed on the billing and payment page.

• Improvements to the water treatment plant (changing filters, using sand, etc.)

• Scientific study in progress on manganese treatment 

• Grant applications

• Updates and improvements to Pumping Station 1.

• Ongoing communication with our partners, OCWA and South Nation Conservation.

Aside from the weekend of August 15, 2025 when the Municipality experienced a sudden spike in manganese levels, which were quickly brought under control, the manganese level has remained around the aesthetic standard of 0.02 mg/L thanks to the improvements made above.

The solutions implemented over the past year have enabled the Municipality to control the manganese level in drinking water throughout the season, despite the warm temperatures and low water levels in the river. However, the quality of the water in the river is very unpredictable. We therefore remain cautious at this point about the future, even though there are factors beyond our control. One thing is certain: the analyses and improvements made over the past year have allowed us to better adapt our water filtration methods, and the results for the 2025 summer season are currently very satisfactory.

Yes, it is an option being considered, but only in the long term. The project is very expensive (approximately $75 million), so the Municipality is initially focusing on short- and medium-term solutions to increase its treatment capacity.

However, we have begun discussions with the City of Clarence-Rockland to explore this possibility. A technical study is underway to determine if Casselman could connect to their water system as part of their already funded projects. The results are expected shortly.

For now, this means that this option could remain open for Casselman at no immediate cost, but no final decision has yet been made.

Yes, the Municipality is currently planning an expansion of its drinking water and wastewater treatment capacity. We are currently engaged in a class environmental assessment process for both services. In the interest of sound financial management, the Municipality is proposing an expansion plan to be carried out in successive phases.

A key component of this plan was Pumping Station No. 1, which urgently needed an increase in capacity. This station acts as a central receiver for all wastewater generated in Casselman, receiving the flows from the five other existing pumping stations before transporting them to the treatment plant.

However, Pumping Station No. 1 had already reached its nominal capacity of 118 L/s. An upgrade to 236 L/s was therefore urgently needed. Without this improvement, the Municipality would have been forced to halt any new residential or commercial development to prevent sewer backups or emergency spills.

We have a primary municipal emergency response team composed of the following services: Public Works, Chief Administrative Officer, Mayor’s Office, Communications, Clerk’s Office, and Operations Management. This team is in constant communication with the local emergency situations coordinator. In the event of a water-related emergency, these two groups form the frontline team and develop the intervention plan.

The website remains the preferred communication tool, along with alerts sent via Bciti. Depending on the needs of the emergency committee, a press conference and a news release may be used to share key information.

Under the Ontario Safe Drinking Water Act and our own regulations, the municipality, as the owner of the drinking water system, is responsible for ensuring that drinking water is provided to residents in accordance with provincial regulations. On behalf of the owner, the AOE operates and maintains the water treatment facility and the water distribution system. Casselman's drinking water network is inspected annually by the Ministry of the Environment, Conservation and Parks to ensure compliance with regulations.

In accordance with its regulations, the Municipality of Casselman is required to convey potable water from the water intake of the treatment plant to the service connection located in the distribution network at the boundary of your property.

We advise residents to exercise caution when considering purchases of water filtration systems. While we understand the importance of health and safety, it is essential to make informed decisions based on verified information.

Historically, the Casselman Water Treatment Plant has experienced challenges in reducing total manganese levels below aesthetic guidelines at various times during the spring and summer seasons. Maximum concentrations of manganese in raw water typically occur during the hottest summer months when the temperature of the raw water is higher. Indeed, at higher temperatures, dissolved oxygen levels at the bottom of the river decrease, causing insoluble manganese oxides to become soluble through bacterial action and leached from sediments. While the AOE is striving to optimize the best performance of the existing infrastructure, the current processes of the facility limit its ability to treat the quality of raw water entering the system.

The municipality received funding in 2022 as part of the Investing in Canada Infrastructure Program to explore manganese treatment options in the drinking water system. J.L. Richards & Associates Limited (JLR) was retained by the Municipality of Casselman to provide engineering services for the design and associated tendering for upgrades to the Laval Street Water Treatment Plant in Casselman to address manganese (Mn) concentrations in the river, which are currently not sufficiently reduced at the water treatment plant.

The municipality is considering all options, including initiating an environmental assessment (EA) process to explore solutions regarding treatment and hydraulic capacity of the South Nation River.

In addition to the steps already taken with the Ontario Water Agency and the Walkerton Expertise Center, the Municipality of Casselman has retained the professional services of Mr. Bill Dallala, a chemical engineer specializing in water quality, to bolster our water management efforts. During his visits to our facilities, detailed analyses and inspections of equipment configuration will be conducted, along with assessments related to oxidation and filtration. Following this, the municipality will receive a comprehensive report with appropriate recommendations. We are actively committed to continuously improving our approach to ensure a safe and reliable water supply.

There is currently a strong demand for development in Casselman. Several developers are willing to invest significant sums in our territory to help alleviate the housing shortage, both in the region and across the province. The Municipality wishes to work closely with these developers and with the Ontario government to support provincial residential development objectives. (To be confirmed with the Mayor for this passage.)

Development also plays a vital role in maintaining affordable property taxes. With infrastructure maintenance and replacement costs increasing annually by 6 to 7%, municipalities can hardly raise property tax rates by more than 2 or 3% (based on the CPI). This reality creates growing budgetary pressure. Development therefore broadens the tax base and maintains municipal services accessible to all, without necessarily increasing them.

Finally, development also helps make the community more attractive to new services and businesses. A growing population is an important lever for attracting private investment and improving the service offering for all residents.

No

Despite what some packaging may claim, wipes are not flushable down the toilet. Additionally, paper towels and tissues do not belong in the toilet either. These items cannot be flushed as they do not break down like toilet paper.

In sewers, wipes, paper towels, and tissues clog pipes. Moreover, these items can block sewers and cause sewage overflow into streets and the environment. These wastes can also damage local sewer infrastructure. The only things that should go in toilets are urine, feces, and toilet paper. That's it. Disinfectant wipes, paper towels, tissues, and other items are not acceptable. Please dispose of wipes, tissues, and paper towels in the trash.

Thank you for your cooperation.

The source of Casselman's drinking water is located within the South Nation River Source Protection Area and is protected by a Regional Source Water Protection Plan. The plan aims to safeguard the raw water we draw from rivers or aquifers to convert into drinking water against contamination and overuse. To learn more about the protection plan or to view assessment reports, visit Our Drinking Water.

If the request is not urgent or can be addressed within a reasonable timeframe, please fill out the customer service form

Manganese is an essential nutrient (mineral) for all living organisms that occurs naturally in the environment. It can be found in air, food, water, soil and rocks. Manganese enters drinking water sources when water dissolves minerals containing it. Consumption of a small amount of manganese from food or water is necessary for good health.

For a long time, manganese in drinking water was considered only an aesthetic problem (e.g. the source of stains in laundry, plumbing fixtures, etc.). However, recent research suggests that exposure to high levels of manganese in drinking water for prolonged periods may cause health problems in infants, mainly to the central nervous system. This new information has been used to revise Health Canada's guidelines for manganese in drinking water.

For adults and older children, short-term exposure to manganese in drinking water, at levels slightly above this value (see below), is unlikely to be harmful to health. This is because the guideline value is based on infants. Protecting infants, who are most at risk, protects all Canadians.

According to Health Canada's new guidelines, drinking water with a manganese content of 0.12 mg/l or less is considered safe for consumption. This maximum acceptable concentration (MAC) of manganese is based on scientific research and includes safety factors to ensure that sensitive individuals, including infants, are protected even if exposed to high levels for extended periods. Concentrations at or below the MAC pose no increased health risk to anyone.

Studies suggest that for adults and older children, drinking water with a manganese content of over 1mg/l for more than 10 days may present a health hazard. (Note: For children under 6 months, the level is less than 0.3 mg/l. We therefore recommend that another water source be used for diluting or reconstituting formula for infants under 6 months of age who are exclusively formula-fed).
 

Although the manganese content of Casselman's drinking water randomly exceeded Health Canada's guideline of 0.12 mg/l, there was only one day in the summer of 2023 when it exceeded 1 mg/l: 1.002 mg/l. Note that the following day, manganese levels dropped significantly to 0.24 and 0.105 mg/l, respectively.

As the water meets all Ontario drinking water standards, it remains safe for adults and older children despite the discoloration. The EOHU is monitoring the situation. If levels reach and remain above 1 mg/l for more than 10 days, the EOHU will recommend an alternative source of drinking water for residents.

Infants are at greater risk after exposure to high levels of manganese in drinking water because their brains are developing rapidly; they drink more water relative to their body weight; they absorb more manganese and are less capable of eliminating it from their bodies compared to older children and adults. Infants who consume infant formula mixed with high manganese content drinking water are particularly at risk. Therefore, if the current manganese content in the municipality's drinking water exceeds Health Canada's recommendation (0.12 mg/l), it is recommended to use another water source (e.g., bottled water) to prepare infant formula for infants under 6 months who are exclusively fed with it.

Older children and adults, including pregnant women, are at lower risk because they absorb much less manganese from their food and water than infants.

Infant formulas mixed or diluted with tap water may expose bottle-fed infants to manganese. If the current manganese content in the municipality's drinking water exceeds Health Canada's recommendation of 0.12 mg/l, it is recommended to use another water source (e.g., bottled water) to prepare infant formula for infants under 6 months who are exclusively fed with it. Note that when the manganese content reaches and consistently remains below 0.12 mg/l, this recommendation can be lifted.

Manganese absorption and excretion are regulated by the mother's body. Adults, including pregnant or breastfeeding women, absorb much less manganese from their food and water than infants. Therefore, developing fetuses are less sensitive to manganese in drinking water than infants. Breastfeeding is likely not a significant exposure pathway.

Boiling does not remove manganese from water. Boiling water for an extended period is not recommended. However, it is safe to cook as usual with the water, although there may be a change in the taste of the food.

Exposure to manganese through skin contact is not harmful. The risk of exposure associated with handwashing, showering, or bathing with water containing high levels of manganese is unlikely to be significant.

In times of crisis, the Eastern Ontario Health Unit (EOHU) monitors the situation daily. If the content reaches and remains above 1 mg/l for more than 10 days, the EOHU will then recommend an alternate source of drinking water for everyone.

For updates to the FAQ, please visit the Eastern Ontario Health Unit website at www.EOHU.ca.

You can find additional information in the following resources:

Let's Talk About Water - Manganese in Drinking Water (Canada.ca) https://www.canada.ca/fr/sante-canada/services/sante-environnement-milieu-travail/rapports-publications/qualite-eau/manganese-dans-eau-potable.html

Frequently Asked Questions: MANGANESE (northernhealth.ca) https://www.northernhealth.ca/sites/northern_health/files/services/environmental-health/documents/faq-manganèse-information-sheet.pdf

The AOE conducts flushing of the distribution network according to a set schedule. Flushing of the entire distribution network is carried out twice a year, in May and October. Flushing of dead ends in the system occurs regularly during the summer months, from June to September. Around mid-July, the AOE flushes the system to help reduce some sediment deposits caused by high manganese levels. We are monitoring this activity to see if it helps alleviate certain issues and we will take action accordingly.

The source water supplying the Casselman Water Treatment Plant contains soluble minerals such as calcium, magnesium, iron, and manganese. When treatment is applied to the water, it oxidizes the dissolved minerals, causing some of them to precipitate out of solution as mineral oxides. These insoluble mineral oxides may be noticed by residents in the form of sediment in their water and contribute to water discoloration. Although this is unpleasant, sediments and discoloration are aesthetic issues. Scale and hard water sediments can affect household equipment such as your hot water tank. Regular maintenance of your household equipment according to the manufacturer's recommendations should be performed. The intervals for such maintenance may vary depending on water quality.

The water discoloration issue does not occur on an annual basis. Fluctuations in the chemical composition of raw water from the treatment plant's water source cannot be accurately predicted in advance. Testing and consultations occur regularly to optimize water quality and address concerns. Communication with residents will continue to address concerns as they arise. The concentration of manganese in the raw water fluctuates with the seasons, and there are typically more water quality issues during the summer months, especially when the weather is very hot and there is little precipitation.

Due to the fluctuating conditions of the South Nation River, manganese levels in raw water constantly change. The AOE continuously conducts tests at the plant to optimize the system in response to these changing conditions. Consultations regarding manganese levels regularly occur between the Municipality, AOE representatives, and regulatory agencies, including the Ministry of the Environment, Conservation and Parks (MECP) and the Eastern Ontario Health Unit (EOHU). Relevant information based on these discussions is communicated by the Municipality to residents regarding the current situation.

Ontario Water Agency (OCWA) is a Crown agency of the Province of Ontario established in 1993. OCWA provides various water supply and wastewater treatment services, including operation, maintenance, and management of water treatment plants, wastewater treatment facilities, and related infrastructure. The agency works with municipalities, Indigenous communities, and other clients to ensure the delivery of clean and safe drinking water, as well as effective wastewater management across the province.

OCWA is trusted due to its extensive experience, proven track record, and accountability as a Crown corporation, ensuring reliable and high-quality water and wastewater services. Their collaborative approach and commitment to public health further contribute to the trust they receive from communities and stakeholders across Ontario. Throughout Ontario, OCWA operates facilities designed, constructed, and operated by network owners for the safe cleaning and distribution of water. OCWA's annual reports are available below.

OCWA has been operating the Municipality of Casselman's drinking water system since 2017 and its sewage system since 2021.

As it takes time to gather the various reports, compile, and verify the data, monthly reports for the Municipality are due by the end of the following month for the previous month. Before the report is publicly released, it must be presented to the municipal council. The reports are available below.

• January 2025
• February 2025
• March 2025
• April 2025
• May 2025
• June 2025

• January 2024
• February 2024
• March 2024
• April 2024
• May 2024
• June 2024
• July 2024
• August 2024
• September 2024
• October 2024
• November 2024
• December 2024

• January 2023
• February 2023
• March 2023
• April 2023
• May 2023
• June 2023
• July 2023
• August 2023
• September 2023
• October 2023
• November 2023
• December 2023

• January 2022
• February 2022
• March 2022
• April 2022
• May 2022
• June 2022
• July 2022
• August 2022
• September 2022
• October 2022
• November 2022
• December 2022