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 <5 <100 <100
FR2 10 24 25 70 400 1900
FR3 15 26 40 70 200 2000
FR4 15 30 80 85 100 2900

 

Still River
APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER
SR1 10 12 700 130 <100 400
SR2 30 60 280 950 600 1100
SR3 20 480 300 700 700 3300
SR4 20 52 280 90 300 2500
Mad River
APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER
MR1 <5 Too numerous 90 140 100 800
MR2 20 Too numerous 25 1300 400 600
MR3 20 80 260 65 1200 3000
MR4 30 80 300 700 800 3200

 

Morgan Brook
APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER
MB1 20 10 180 420 500 300
MB2 <10 Too numerous 95 150 100 200
MB3 10 5 35 20 500 200