Bessette E.Coli | Sustainable Environment Network Society

	E.coli
	primary contact maximum 77/100mL ^(*)
mid November	2013	2014	2015	Mean
Harris	7	20	25	15
Duteau	12	34	21	20
Vance			8	8
Mid Bessette	13	11	51	19
Lower Bessette	11	10	43	17
mid September
Harris	190	26	73	71
Duteau	78	170	180	134
Vance			11	11
Mid Bessette	210	120	120	145
Lower Bessette	89	53	64	67
mid August
Harris	2100	270	230	507
Duteau	380	190	110	200
Vance			29	29
Mid Bessette	290	270	140	222
Lower Bessette	250	290	150	222
mid July
Harris	80	190	1900	307
Duteau	330	310	600	394
Vance			260	260
Mid Bessette	2	150	2000	84
Lower Bessette	51	100	500	137
late May (freshet)
Harris	140	20	22	39
Duteau	180	29	55	66
Vance			1	1
Mid Bessette	88	31	41	48
Lower Bessette	56	36	43	44
late April
Harris	12	24	52	25
Duteau	30	11	43	24
Vance			--	--
Mid Bessette	26	18	45	28
Lower Bessette	17	35	22	24

(*) Primary Contact Maximum :-

B.C. provincial standard for recreation with most of the body in the water and risk of ingestion (e.g. swimming).

ref. http://www.env.gov.bc.ca/wat/wq/BCguidelines/microbiology/microbiology.html#tab1

The Canadian standard is much higher, being a count of 200/100mL.

ref. http://healthycanadians.gc.ca/publications/healthy-living-vie-saine/water-recreational-recreative-eau/index-eng.php?page=9#a411

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.