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  

(¥) other date

(§) 1/2 Mile (Beckman) replaced South Fork Aug 2018

(*)Primary Contact Maximum :-

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.