Water Quality
Summary of Latest 2017 Test Results
Water quality was measured in 2 different spots in Dows Lake on June 9th 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 Results (June 9 2017)
Ottawa International Triathlon – Water Quality Results (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 |