Cherry E.Coli
| E.coli | |||||||||||||||||
| primary contact maximum was 77, now 200 ! * | |||||||||||||||||
| November | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | g-Mean |
| North Fork | <1 | <1 | <1 | 1 | <1 | <1 | 31 | 4 | 1 | 1 | 3 | 1 | 2 | <1 | 2 | 1 | 2.1 |
| South Fork > 1/2 Mile (§) | 1 | <1 | <1 | <1 | 1 | <1 | 4 | <1 | 3 | 1 | <1 | <1 | <1 | <1 | <1 | <1 | 1.6 |
| Mid Cherry | <1 | 1 | <1 | 9 | 7 | 3 | 2 | 26 | 2 | 8 | 2 | <1 | 3 | 4.0 | |||
| Lower Cherry | 1 | 1 | <1 | 1 | 7 | 1.6 | |||||||||||
| geometric Mean | 1.00 | 1.00 | <1 | 1.00 | 1.00 | 1.00 | 9.40 | 5.29 | 2.08 | 1.26 | 8.98 | 1.41 | 4.00 | 2.00 | 2.00 | 1.73 | |
| August | |||||||||||||||||
| North Fork | 8 | 2 | 4 | 8 | 7 | 7 | 3 | 2 | 12 | 2 | 150 | 1 | 9 | 8 | 8 | 11 | 6.1 |
| South Fork > 1/2 Mile (§) | 10 | 1 | <1 | 3 | 6 | 5 | 5 | 1 | 6 | <1 | <1 | <1 | 2 | 1 | 1 | 2 | 2.6 |
| Mid Cherry | 12 | 15 | 7 | 12 | 18 | 21 | 6 | 110 | 20 | 13 | 6 | 10 | 13 | 14.0 | |||
| Lower Cherry | 3 | 2 | 5 | 8 | 18 | 34 | (1) ¥ | 8 | 5.7 | ||||||||
| geometric Mean | 6.21 | 1.59 | 4.47 | 6.60 | 8.57 | 6.65 | 7.54 | 3.30 | 11.48 | 7.42 | 25.46 | 4.47 | 6.16 | 3.63 | 4.31 | 6.92 | |
| May | |||||||||||||||||
| North Fork | 1 | 4 | 27 | 2 | <1 | 1 | 1 | 5 | 3 | 1 | 3 | 1 | 1 | 34 | 1 | 1 | 2.3 |
| South Fork > 1/2 Mile (§) | 2 | 6 | <1 | <1 | 1 | 2 | 3 | 3 | 2 | 2 | 1 | <1 | <1 | <1 | <1 | <1 | 2.1 |
| Mid Cherry | <1 | 10 | 8 | 2 | 10 | 4 | 6 | 2 | 126 | 8 | 11 | 10 | 1 | 6.7 | |||
| Lower Cherry | 4 | 44 | 20 | 5 | 6 | 3 | 6 | (31) ¥ | (93) ¥ | 12.1 | |||||||
| geometric Mean | 2.00 | 10.18 | 23.24 | 2.00 | 3.16 | 2.99 | 2.45 | 5.31 | 2.88 | 2.29 | 2.06 | 9.11 | 6.28 | 19.34 | 3.16 | 4.53 | |
(§) 1/2 Mile (Beckman) replaced South Fork Aug 2018
B.C. provincial standard for recreation with most of the body in the water and risk of ingestion (e.g. swimming).
The B.C. standard was raised to match the Canadian standard, a count of 200/100mL.
Both references speak of the geometric mean of several samples, as opposed to single-sample maximum. The standards quoted here are for the geometric mean, a lower maximum than allowed by a single sample result.