Upper Farmington River 2018 E.coli levels

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

2018 E.coli Chart

 

 

 

Farmington River
APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER
FR1 <5 4 <5
FR2 10 24 25
FR3 15 26 40
FR4 15 30 80

 

Still River
APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER
SR1 10 12 700
SR2 30 60 280
SR3 20 480 300
SR4 20 52 280
Mad River
APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER
MR1 <5 Too numerous 90
MR2 20 Too numerous 25
MR3 20 80 260
MR4 30 80 300

 

Morgan Brook
APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER
MB1 20 10 180
MB2 <10 Too numerous 95
MB3 10 5 35