Lower Farmington River 2018 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

 2018 E.coli Chart

AVON

 Site NumberStream NameCollection DateE.coli colonies/100 mL
TB-A1Thompson Brook5/21/201873
TB-A1Thompson Brook6/11/201831
TB-A1Thompson Brook6/25/20183255
TB-A1Thompson Brook7/16/201841
TB-A1Thompson Brook7/30/201810
TB-A1Thompson Brook8/13/201820
NB-A1Nod Brook5/21/201898
NB-A1Nod Brook6/11/2018175
NB-A1Nod Brook6/25/201812997
NB-A1Nod Brook7/16/2018355
NB-A1Nod Brook7/30/2018121
NB-A1Nod Brook8/13/2018108

BURLINGTON

 Site NumberStream NameCollection DateE.coli colonies/100 mL
BB-B1Bunnell Brook6/4/20182143
BB-B1Bunnell Brook6/18/201863
BB-B1Bunnell Brook7/9/201820
BB-B1Bunnell Brook7/23/2018959
BB-B1Bunnell Brook8/6/201841

CANTON

 Site NumberStream NameCollection DateE.coli colonies/100 mL
CB-C1Cherry Brook6/4/20184106
CB-C1Cherry Brook6/18/20182481
CB-C1Cherry Brook7/9/2018408
CB-C1Cherry Brook7/23/20185172
CB-C1Cherry Brook8/6/20181616

EAST GRANBY

 Site NumberStream NameCollection DateE.coli colonies/100 mL
FR-EG1Farmington River6/4/20181333
FR-EG1Farmington River6/18/2018121
FR-EG1Farmington River7/9/201863
FR-EG1Farmington River7/23/2018813
FR-EG1Farmington River8/6/2018428

FARMINGTON

 Site NumberStream NameCollection DateE.coli colonies/100 mL
RO-F1Roaring Brook6/4/20181785
RO-F1Roaring Brook6/18/201875
RO-F1Roaring Brook7/9/201897
RO-F1Roaring Brook7/23/201875
RO-F1Roaring Brook8/6/2018142
FR-F1Farmington River6/4/201897
FR-F1Farmington River6/18/201841
FR-F1Farmington River7/9/201831
FR-F1Farmington River7/23/2018250
FR-F1Farmington River8/6/2018213
PR-F1Pequabuck River6/4/2018857
PR-F1Pequabuck River6/18/20181014
PR-F1Pequabuck River7/9/2018231
PR-F1Pequabuck River7/23/20183873
PR-F1Pequabuck River8/6/2018530
FR-F2Farmington River6/4/2018256
FR-F2Farmington River6/18/2018323
FR-F2Farmington River7/9/201852
FR-F2Farmington River7/23/20181081
FR-F2Farmington River8/6/2018243
FR-F3Farmington River6/4/2018512
FR-F3Farmington River6/18/2018108
FR-F3Farmington River7/9/2018146
FR-F3Farmington River7/23/20181178
FR-F3Farmington River8/6/2018480

SIMSBURY

 Site NumberStream NameCollection DateE.coli colonies/100 mL
MB-S1Munnisunk Brook5/21/201831
MB-S1Munnisunk Brook6/11/201810
MB-S1Munnisunk Brook6/25/20181956
MB-S1Munnisunk Brook7/16/201874
MB-S1Munnisunk Brook7/30/2018<10
MB-S1Munnisunk Brook8/13/201886
MS-S1Minister Brook5/21/2018677
MS-S1Minister Brook6/11/201885
MS-S1Minister Brook6/25/2018>24196
MS-S1Minister Brook7/16/2018119
MS-S1Minister Brook7/30/2018108
MS-S1Minister Brook8/13/20183076
RB-S1Russell Brook5/21/201831
RB-S1Russell Brook6/11/201852
RB-S1Russell Brook6/25/2018794
RB-S1Russell Brook7/16/2018132
RB-S1Russell Brook7/30/2018<10
RB-S1Russell Brook8/13/2018480
FR-S1Farmington River5/21/2018110
FR-S1Farmington River6/11/2018110
FR-S1Farmington River6/25/20182282
FR-S1Farmington River7/16/201874
FR-S1Farmington River7/30/201874
FR-S1Farmington River8/13/2018144
FR-S3Farmington River5/21/2018158
FR-S3Farmington River6/11/201874
FR-S3Farmington River6/25/2018767
FR-S3Farmington River7/16/201820
FR-S3Farmington River7/30/2018146
FR-S3Farmington River8/13/2018426
HB-S1Hop Brook5/21/201897
HB-S1Hop Brook6/11/2018134
HB-S1Hop Brook6/25/20183968
HB-S1Hop Brook7/16/201884
HB-S1Hop Brook7/30/201874
HB-S1Hop Brook8/13/20181658
FR-S2Farmington River5/21/2018122
FR-S2Farmington River6/11/201874
FR-S2Farmington River6/25/20181553
FR-S2Farmington River7/16/201898
FR-S2Farmington River7/30/2018145
FR-S2Farmington River8/13/2018301

GRANBY

 Site NumberStream NameCollection DateE.coli colonies/100 mL
SB-EB1East Branch Salmon Brook6/4/20183448
SB-EB1East Branch Salmon Brook6/18/2018771
SB-EB1East Branch Salmon Brook7/9/2018324
SB-EB1East Branch Salmon Brook7/23/201812033
SB-EB1East Branch Salmon Brook8/6/2018228
SB-2Salmon Brook6/4/20183255
SB-2Salmon Brook6/18/2018216
SB-2Salmon Brook7/9/2018259
SB-2Salmon Brook7/23/20186867
SB-2Salmon Brook8/6/2018185
SB-WB3West Branch Salmon Brook5/21/201810
SB-WB3West Branch Salmon Brook6/11/201831
SB-WB3West Branch Salmon Brook6/25/20183873
SB-WB3West Branch Salmon Brook7/16/2018134
SB-WB3West Branch Salmon Brook7/30/2018122
SB-WB3West Branch Salmon Brook8/13/20181281

WINDSOR

 Site NumberStream NameCollection DateE.coli colonies/100 mL
FR-W1Farmington River6/4/2018350
FR-W1Farmington River6/18/201831
FR-W1Farmington River7/9/201852
FR-W1Farmington River7/23/2018121
FR-W1Farmington River8/6/2018262
PB-W1Phelps Brook6/4/201811199
PB-W1Phelps Brook6/18/2018313
PB-W1Phelps Brook7/9/2018345
PB-W1Phelps Brook7/23/2018988
PB-W1Phelps Brook8/6/2018256
ML-W1Mill Brook6/4/201810462
ML-W1Mill Brook6/18/2018565
ML-W1Mill Brook7/9/2018256
ML-W1Mill Brook7/23/20182613
ML-W1Mill Brook8/6/2018389
FR-W2Farmington River6/4/2018487
FR-W2Farmington River6/18/201863
FR-W2Farmington River7/9/201851
FR-W2Farmington River7/23/201885
FR-W2Farmington River8/6/2018175

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