Water Quality

Lake Pemichangan Water Test Results – 2013

The results of the 2013 water testing results can be found at the following address:


The next full-testing will be done in 2017. In the meantime, water clarity testing will be done and submitted to the database.

Lake Pemichangan Water Test Results – 2003

MicroB Microbiological Laboratories

67, boul. St-Raymond, Gatineau, Sect Hull QC J8Y 1S3
Tel: (819) 778-0020 Fax: (819) 778-0659



Name and Address of the client:Lake Pemichangan Cottage Owners Association Sampling site: Lake Pemichangan, QuebecSamples taken by: Dwight Fulford [email protected] (and Angela Fulford)Sampling Date: August 11, 2003Date of reception by laboratory: August 11, 2003Hour of reception by laboratory: 16:30
Sample No. Sampling Time ClaritySecchi Disk [m] Laboratory Sample No. Total Coliforms per 100 ml Fecal Coliforms per 100ml
1 10:35 6 ¾¾ 45326 430 < 2
2 10:46 8 ¼¼ 45327 196 < 2
3 11:05 7 ¼¼ 45328 224 < 2
4a 11:10 7 ¼¼ 45329 330 2
4b 11:15 (bottom) 5 45330 96 < 2
5 11:34 7 ¾¾ 45331 280 < 2
6 11:42 (bottom) 5 ½½ 45332 190 4
7 11:52 7 ¼¼ 45333 176 < 2
8 12:21 6 ¾¾ 45334 240 < 2
9 12:34 (bottom) 3 45335 520 4
10 12:27 7 ¼¼ 45336 630 < 2
11 12:04 7 ¾¾ 45337 248 2
12 12:14 3 /8 45338 188 < 2
Date Analyzed: August 12, 2003Date of Report: August 13, 2003Microbiologist: Bozenna Borkowska-Skora, M.Sc

Lake Pemichangan Water Sample Sites
August 11, 2003



Thirteen water samples were taken around lake Pemichangan at locations indicated on the above map. These samples were taken to Laboratoire MicroB in the Gatineau for analysis. The samples were tested for ”Total number of Coliforms” and number of ”Fecal Coliforms”. The unit of measure used is the number of coliform colonies per 100 milliliters. Water clarity was measured using the Secchi disk method.

Based on the results it can be said that lake Pemichangan water is exceptionally good for swimming but not acceptable for drinking. Health Canada would not recommend drinking any lake water, without first treating it.

As lake water goes Pemichagan water is excellent. The maximum total number of coliforms found was 630cfu/100ml (average 288cfu/100ml), the maximum total number of fecal coliforms was 4cfu/100ml (average about 2 cfu/100ml). The Secchi tests showed clarity depths up to 8 ¼¼ m (27feet).

The fecal coliform level generally accepted as safe for swimming is anything under 500cfu/100ml. Levels under 50cfu/100ml is considered extraordinarily good. Total number of coliforms in swimming water should be under 10,000cfu/100ml.

For water to be considered acceptable to drink, fecal coliform levels should be zero and the total coliform levels should be less than 10cfu/100ml.

Coliforms are a rod-shaped bacteria present in water. The presence of coliforms is expected in natural bodies of water. Examples of coliform bacteria are members in the genera Escherichia ( e.g.E.coli), Klebsiella (e.g. K. pneumoniae), Enterobacter (e.g. E. cloacai), and Citrobacter (e.g. C. freundii).

Fecal Coliforms are bacteria that live in the intestines of warm-blooded animals. They are not necessarily harmful themselves, but they may indicate the presence of viruses and pathogens that are harmful to humans (generally causing intestinal ailments).

A secchi disk is an 8 inch diameter disk painted in alternate black and white quadrants.

The Secchi disk is used to measure how deep a person can see into the water.

A Secchi Disk measures water clarity. Water clarity may be affected by algae, sediment and / or water colour. A single reading in a lake is not a useful indicator of water quality, however, if readings are taken regularly over the years the trend is an indication of changing phosphate levels.

The Secchi readings around the lake averaged over 7 metres. This is apparently very clear. It is an indication that Pemichangan is ”Oligotrophic” which means that it is low in accumulated nutrients and high in dissolved oxygen.