The Upper Farmington River is designated as Wild & Scenic. Sampling is done by the FRWA and taken to the MCD (Metropolitan District Commission) Lab at the Water Treatment Facility in Bloomfield for analysis.

Postings of the E.coli levels will let you know more about the status of the river. The numbers in the chart below indicate a sample. Remember a sample is just that, a sample. At the end of the year the FRWA can calculate a geometric mean. Right now you can see how the numbers change depending on factors such as heavy rain increasing pollutant runoff, etc. Click here to see FRWA’s Water Quality Map and for photos of the sites.

E. coli is not considered safe in drinking water at any levels; however the current standards for recreational use levels of E.coli are posted by the CT DEEP as follows. There are no “designated swimming” areas in the Lower Farmington River. Use this as a guide for understanding the numbers in the chart below.

Recreation Geometric Mean Single Sample Maximum
Designated Swimming less than 126/100ml 235/100ml
Non-designated Swimming less than 126/100ml 410/100ml
All Other Recreational Uses less than 126/100ml 576/100ml

2019 E.coli Chart

Farmington River
APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER
FR1 <10 <10 <5
FR2 230 Too numerous 90
FR3 50 30 100
FR4 50 50 130
Still River
APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER
SR1 <10 130 270
SR2 110 70 380
SR3 130 70 150
SR4 190 170 340
Mad River
APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER
MR1 <10 10 40
MR2 2260 50 60
MR3 20 90 130
MR4 50 70 250
Morgan Brook
APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER
MB1 30 Too numerous 240
MB2 <10 30 160
MB3 10 Too numerous 45
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