Date: July 17, 2019

Showers or thunderstorms ending near noon then mainly cloudy with 40 percent chance of showers. Risk of a thunderstorm late this afternoon. Local amount 15 to 25 mm. High 28. Humidex 37. UV index 7 or high.


Feels like 34C

Environment Canada
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Safe Water

Drinking Water

Recreational Water



This page was reviewed or revised on Thursday, May 31, 2018 11:47 AM

Beach Water Quality Monitoring Program

Beach Water Testing in Lambton
Beach Water Sample Results - beach advisories
Lifeguard Status and Warning Flags

Beach Water Testing in Lambton

During the summer, Lambton County beaches provide tourists and local residents with a relaxing place to swim and play recreational sports. To ensure water is safe for swimming, Lambton Public Health tests and monitors seven public beaches from the beginning of June to the end of August for levels of E.coli bacteria.

What Beaches are Monitored in Lambton?

The following beaches are monitored and tested weekly by Lambton Public Health:

  • Grand Bend North beach
  • Grand Bend South beach
  • C. J. McEwen beach
  • Bright's Grove beaches (including Mike Weir Park)
  • Canatara Park beach
  • Ipperwash beach
  • Pinery Provincial Park

Beaches are monitored to determine pollution levels in the water to prevent illness in bathers. Water is tested for E.coli bacteria. High levels of bacteria increase the risk of skin, eye, ear, nose and throat infections or gastrointestinal illness.

While weekly water sampling at public beaches is a good way to monitor beaches for bacteria, the delay in receiving lab results and the frequency of testing will only provide part of the information you need. Therefore, LPH will also be using a predictive model at some of its monitored beaches along with weekly water sampling.

A predictive model is a tool used to predict E.coli levels within public beach water. It uses environmental factors (weather conditions, wind, wave activity, etc.), beach conditions, past beach data, etc to predict E.coli levels in beach water.

Starting in June, the following beaches will be sampled daily using predictive models (Monday-Friday):

  • Grand Bend North beach
  • Grand Bend South beach
  • Ipperwash Main beach
  • Brights Grove's beaches including Mike Weir Park
  • Canatara Park beach.

Please note that Lambton Shores may on occasion use prediction modelling on the weekend at Grand Bend beaches.

As in previous years, the following beaches will be sampled weekly:

  • Pinery Provincial Park
  • C. J. McEwen Conservation Area


Why are Beaches Posted?

Ontario beaches are posted with warnings of possible health risks when high levels of E.coli are detected or predicted. E.coli bacteria are found in the intestines and feces of all warm-blooded animals. Warnings are posted when the levels of E.coli exceed (or are predicted to exceed) the provincial guidelines (200 E.coli per 100mL of beach water). Beach warning signs are removed after the E.coli levels have decreased (or are predicted to decrease) to acceptable levels.

Before Using a Beach

Beaches in Lambton have a history of being safe. High bacteria levels usually occur due to weather-related events.

You can judge the water quality yourself by answering the following 4 simple questions together with the latest beach sampling results:

  1. Is the beach posted with a warning sign?
  2. Was there heavy rain in the last 24 to 48 hours? If so, bacteria levels may be higher and swimming is not recommended.
  3. Is the water cloudy? If you can't see your feet at adult's waist depth, bacterial levels may be higher and swimming is not recommended.
  4. Are there any other problems with the beach? Large number of waterfowl, dead fish, algae/scum, dangerous debris etc. indicate an increased health risk.

Water quality information is available 24 hours a day, 7 days a week by calling the Beach Water Quality Information Line at 519-383-3816, toll free at 1-800-667-1839 ext. 3816.

Additional Safety Resources


Blue Flag Beaches

Public Beaches in Surrounding Counties

Water Wise - a safety and injury prevention campaign to reduce drowning and other water-related injuries. The goal of Water Wise is to raise awareness, provide education and to create supportive environments to promote water safety.

Water Wise logo - play safe!