Water Quality of Dow’s Lake – Ottawa International Triathlon

Water Quality

Summary of Latest 2017 Test Results

Water quality was measured in 2 different spots in Dows Lake on June 9thÂ 2017

Test	Units	Sample 1	Sample 2
E Coli Test	CFU/100ml	E10	E14
pH Test	pH units	8.75	8.75

Full results here

The water in Dows Lake is tested regularly by the City of Ottawa Baseline Surface Water Monitoring Program and is classed as âGood to Excellentâ. The program provides historical data each month for Dows Lake from 2010 to 2015.

The Water Quality Baseline Surface Water Monitoring Program Baseline List can be found here:

http://data.ottawa.ca/en/dataset/water-quality

The water quality requirements set by the International Triathlon Union (ITU) for competition are as follows:

PH between 6 and 9;
Escherichiacoli E. Coli not more than 500 per 100 ml (CFU/100ml);
Entero-cocci not more than 200 per 100 ml (CFU/100ml);

All historical data in the Baseline List meets the first two key requirements for competition. The third test is not undertaken by the monitoring program, and will be part of our own tests undertaken in the lead up to the competition. The results of these tests can be found here:

Ottawa International Triathlon – Water Quality ResultsÂ (June 9Â 2017)

Ottawa International Triathlon – Water Quality ResultsÂ (June 2 2017)

Water quality does fluctuate based on the weather, temperature and the length of time the canal is frozen over the winter. While unlikely, should water quality not be suitable at the time of the event then pre-approved alternative plans will be implemented.All the pH and E Coli test data for the past 6 years can be found below. pH is measured in pH units and E Coli in CFU/100ml.

Depth	Date	Test	Result
0.5	2010-05-21	E Coli – Total	<10
	2010-05-21	E Coli – Total	<10
0.5	2010-05-21	pH	8.67
	2010-05-21	pH	8.66
0.5	2010-06-23	E Coli – Total	<2
	2010-06-23	E Coli – Total	<2
0.5	2010-06-23	pH	8.52
	2010-06-23	pH	8.32
	2010-07-28	E Coli – Total	E3
0.5	2010-07-28	E Coli – Total	E2
0.5	2010-07-28	pH	8.54
	2010-07-28	pH	8.54
	2010-08-24	E Coli – Total	E33
0.5	2010-08-24	E Coli – Total	102
0.5	2010-08-24	pH	8.38
	2010-08-24	pH	8.25
	2010-09-15	E Coli – Total	E25
0.5	2010-09-15	E Coli – Total	40
0.5	2010-09-15	pH	8.56
	2010-09-15	pH	8.54
	2010-10-05	E Coli – Total	96
0.5	2010-10-05	E Coli – Total	56
0.5	2010-10-05	pH	8.44
	2010-10-05	pH	8.34
0.5	2011-05-26	E Coli – Total	E18
	2011-05-26	E Coli – Total	<10
0.5	2011-05-26	pH	8.6
	2011-05-26	pH	8.26
	2011-06-22	E Coli – Total	E9
0.5	2011-06-22	E Coli – Total	<10
0.5	2011-06-22	pH	8.76
	2011-06-22	pH	8.17
	2011-07-22	E Coli – Total	<10
0.5	2011-07-22	E Coli – Total	<10
0.5	2011-07-22	pH	8.78
	2011-07-22	pH	8.22
	2011-08-09	E Coli – Total	E45
0.5	2011-08-09	E Coli – Total	<10
0.5	2011-08-09	pH
	2011-08-09	pH	8.3
0.5	2011-09-12	E Coli – Total	E10
	2011-09-12	E Coli – Total	E10
0.5	2011-09-12	pH	8.88
	2011-09-12	pH	8.81
0.5	2011-10-12	E Coli – Total	E173
	2011-10-12	E Coli – Total	E118
0.5	2011-10-12	pH	8.77
	2011-10-12	pH	8.76
0.5	2012-05-25	E Coli – Total	E30
	2012-05-25	E Coli – Total	E10
0.5	2012-05-25	pH	8.67
	2012-05-25	pH	8.05
0.5	2012-06-18	E Coli – Total	<10
	2012-06-18	E Coli – Total	<10
0.5	2012-06-18	pH	8.54
	2012-06-18	pH	8.13
0.5	2012-07-20	E Coli – Total	<10
	2012-07-20	E Coli – Total	<10
0.5	2012-07-20	pH	8.58
	2012-07-20	pH	8.53
	2012-08-17	E Coli – Total	E50
0.5	2012-08-17	E Coli – Total	E10
0.5	2012-08-17	pH	8.75
	2012-08-17	pH	8.64
0.5	2012-09-19	E Coli – Total	E10
	2012-09-19	E Coli – Total	E10
0.5	2012-09-19	pH	8.35
	2012-09-19	pH	8.32
	2012-10-04	E Coli – Total	E50
0.5	2012-10-04	E Coli – Total	E100
0.5	2012-10-04	pH	8.55
	2012-10-04	pH	8.45
0.5	2013-05-22	E Coli – Total	<10
	2013-05-22	E Coli – Total	<10
0.5	2013-05-22	pH	8.67
	2013-05-22	pH	8.13
	2013-06-13	E Coli – Total	E20
0.5	2013-06-13	E Coli – Total	<10
0.5	2013-06-13	pH	8.61
	2013-06-13	pH	8.35
0.5	2013-07-11	E Coli – Total	E2
	2013-07-11	E Coli – Total	E2
0.5	2013-07-11	pH	8.75
	2013-07-11	pH	8.05
0.5	2013-08-27	E Coli – Total	E8
	2013-08-27	E Coli – Total	E24
0.5	2013-08-27	pH	8.47
	2013-08-27	pH	8.38
	2013-09-18	E Coli – Total	E12
0.5	2013-09-18	E Coli – Total	E10
0.5	2013-09-18	pH	8.57
	2013-09-18	pH	8.41
0.5	2014-05-30	E Coli – Total	E2
	2014-05-30	E Coli – Total	E2
0.5	2014-05-30	pH	8.63
	2014-05-30	pH	8.5
	2014-06-18	E Coli – Total	E20
0.5	2014-06-18	E Coli – Total	<10
0.5	2014-06-18	pH	8.86
	2014-06-18	pH	8.44
0.5	2014-07-17	E Coli – Total	E2
	2014-07-17	E Coli – Total	E2
0.5	2014-07-17	pH	8.72
	2014-07-17	pH	8.68
0.5	2014-08-26	E Coli – Total	E10
	2014-08-26	E Coli – Total	E10
0.5	2014-08-26	pH	8.93
	2014-08-26	pH	8.82
0.5	2014-09-15	E Coli – Total	E14
	2014-09-15	E Coli – Total	46
0.5	2014-09-15	pH	8.26
	2014-09-15	pH	8.22
	2014-10-06	E Coli – Total	176
0.5	2014-10-06	E Coli – Total	158
0.5	2014-10-06	pH	8.35
	2014-10-06	pH	8.35
0.5	2015-06-10	E Coli – Total	<10
0.5	2015-06-10	pH	8.57
	2015-06-10	E Coli – Total	<10
	2015-06-10	pH	8.41
0.5	2015-07-14	E Coli – Total	E2
0.5	2015-07-14	pH	8.77
	2015-07-14	E Coli – Total	<2
	2015-07-14	pH	8.56
0.5	2015-08-13	E Coli – Total	<10
0.5	2015-08-13	pH	8.61
	2015-08-13	E Coli – Total	<10
	2015-08-13	pH	8.58
0.5	2015-09-15	E Coli – Total	E10
0.5	2015-09-15	pH	8.16
	2015-09-15	E Coli – Total	E20
	2015-09-15	pH	8.15
0.5	2015-10-06	E Coli – Total	E18
0.5	2015-10-06	pH	8.28
	2015-10-06	E Coli – Total	E50
	2015-10-06	pH	8.21