Lower Farmington River 2016 E.coli levels

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. The duplicates show you that 2 samples taken at the same time from the same location can have a very different measured level. 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 the 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

 2016 E.coli Chart

AVON

 Site NumberStream NameCollection DateE.coli colonies/100 mL
TB-A1Thompson Brook6/12/201731
NB-A1Nod Brook6/12/2017464

BURLINGTON

 Site NumberStream NameCollection DateE.coli colonies/100 mL
BB-B1Bunnell Brook6/5/201762
BB-B1Bunnell Brook6/19/201775

CANTON

 Site NumberStream NameCollection DateE.coli colonies/100 mL
CB-C1Cherry Brook6/5/2017122
CB-C1Cherry Brook6/19/2017262

EAST GRANBY

 Site NumberStream NameCollection DateE.coli colonies/100 mL
FR-EG1Farmington River6/5/2017108

FARMINGTON

 Site NumberStream NameCollection DateE.coli colonies/100 mL
RO-F1Roaring Brook6/5/201752
RO-F1Roaring Brook6/19/2017749
FR-F1Farmington River6/5/201731
FR-F1Farmington River6/19/201763
PR-F1Pequabuck River6/5/20161172
PR-F1Pequabuck River6/19/2016341
FR-F2Farmington River6/5/2017275
FR-F2Farmington River6/19/2017109
FR-F3Farmington River6/5/2017249
FR-F3Farmington River6/19/201786

SIMSBURY

 Site NumberStream NameCollection DateE.coli colonies/100 mL
MB-S1Munnisunk Brook6/12/201752
MS-S1Minister Brook6/12/201710
RB-S1Russell Brook6/12/201710
FR-S1Farmington River6/12/201752
FR-S3Farmington River6/12/201797
HB-S1Hop Brook6/12/2017135
FR-S2Farmington River6/12/2017110

GRANBY

 Site NumberStream NameCollection DateE.coli colonies/100 mL
SB-EB1East Branch Salmon Brook6/5/2017428
SB-EB1East Branch Salmon Brook6/19/2017373
SB-2Salmon Brook6/5/2017450
SB-2Salmon Brook6/19/2017776
SB-WB3West Branch Salmon Brook6/12/201741

WINDSOR

 Site NumberStream NameCollection DateE.coli colonies/100 mL
FR-W1Farmington River6/5/201785
FR-W1Farmington River6/19/201763
PB-W1Phelps Brook6/5/2017231
PB-W1Phelps Brook6/19/2017285
ML-W1Mill Brook6/5/2017776
ML-W1Mill Brook6/19/2017609
FR-W2Farmington River6/5/2017145
FR-W2Farmington River6/19/201798

YEARLY GEOMETRIC MEAN

AVON2007200820092010201120122013201420152016
TB-A1212945058805184 112380
NB-A116335890612138209130 90119277
BURLINGTON2007200820092010201120122013201420152016
BB-B1N/AN/AN/AN/A1504739 24162364
CANTON2007200820092010201120122013201420152016
CB-C1N/A35520740833216010556265770
EAST GRANBY2007200820092010201120122013201420152016
FR-EG1N/AN/AN/AN/A36516978 13574181
FARMINGTON2007200820092010201120122013201420152016
RO-F1N/AN/A102104858862 85192221
FR-F12812083557912062 537360
PR-F18461437352750719697329 245642780
FR-F2141413122179199223159 53150204
FR-F3N/AN/AN/A
N/AN/AN/A340
SIMSBURY2007200820092010201120122013201420152016
SB-EB1567378438234715318177 772243501
SB-2N/AN/AN/AN/A445313218 910178367
MS-S1907706071373305321312 78118191
RB-S1190431172415338172568 14377167
FR-S11024471981551659561 1514193
GRANBY2007200820092010201120122013201420152016
MB-S185833616764303558 5425866
SB-WB3N/A1741211332589095 124307125
FR-S316037916910520088108 92156107
HB-S1117328277203430398149 70347240
FR-S222631418411019912687 7330447
WINDSOR2007200820092010201120122013201420152016
FR-W1101N/A12112321312671 5250275
PB-W1N/AN/AN/A174328156251 149287672
ML-W1N/AN/A368367529510195 2903091271
FR-W2N/AN/AN/AN/A21312671 9174112