The Clam River in Sandisfield, MA

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. 

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 Massachusetts Environmental Public Health Tracking and used for their designated swimming areas. Use this as a guide for understanding the numbers in the chart below.

RecreationGeometric MeanSingle Sample Maximum
Designated Swimmingless than 126/100ml235/100ml

2021 E.coli Chart

OTIS

SITE NUMBERSTREAM NAMECollection Date
E.Coli Colonies/100 ML
WBFR-15577-OtisWest Branch Farmington River6/13/202247.4
WBFR-15577-OtisWest Branch Farmington River
WBFR-15577-OtisWest Branch Farmington River
WBFR-15577-OtisWest Branch Farmington River
WBFR-15577-OtisWest Branch Farmington River
WBFR-15577-OtisWest Branch Farmington River
WBFR-15577-OtisWest Branch Farmington River
WBFR-19312-OtisWest Branch Farmington River6/13/202259.1
WBFR-19312-OtisWest Branch Farmington River
WBFR-19312-OtisWest Branch Farmington River
WBFR-19312-OtisWest Branch Farmington River
WBFR-19312-OtisWest Branch Farmington River
WBFR-19312-OtisWest Branch Farmington River
WBFR-19312-OtisWest Branch Farmington River
Thom-140-OtisThomas Brook6/13/20221.0
Thom-140-OtisThomas Brook6/27/202260.5
Thom-140-OtisThomas Brook
Thom-140-OtisThomas Brook
Thom-140-OtisThomas Brook
Thom-140-OtisThomas Brook
Thom-140-OtisThomas Brook
Shal-716-OtisShales Brook6/13/202219.9
Shal-716-OtisShales Brook6/27/20221413.6
Shal-716-OtisShales Brook
Shal-716-OtisShales Brook
Shal-716-OtisShales Brook
Shal-716-OtisShales Brook
WBFR-20220- OtisWest Branch Farmington River6/13/2022159.7
WBFR-20220- OtisWest Branch Farmington River6/27/20221413.6
WBFR-20220- OtisWest Branch Farmington River
WBFR-20220- OtisWest Branch Farmington River
WBFR-20220- OtisWest Branch Farmington River
WBFR-20220- OtisWest Branch Farmington River
Mine-37-OtisMiner Brook6/13/202214.8
Mine-37-OtisMiner Brook6/27/2022224.7
Mine-37-OtisMiner Brook
Mine-37-OtisMiner Brook
Mine-37-OtisMiner Brook
Mine-37-OtisMiner Brook
Mine-37-OtisMiner Brook
Fall-160-OtisFall River6/13/2022111.2

Fall-160-OtisFall River6/27/20221732.9
Fall-160-OtisFall River
Fall-160-OtisFall River
Fall-160-OtisFall River
Fall-160-OtisFall River
Unna-51-OtisUnnamed tributary between Big Pond and Otis Reservoir6/13/202252.1
Unna-51-OtisUnnamed tributary between Big Pond and Otis Reservoir6/27/2022>2419.6
Unna-51-OtisUnnamed tributary between Big Pond and Otis Reservoir
Unna-51-OtisUnnamed tributary between Big Pond and Otis Reservoir
Unna-51-OtisUnnamed tributary between Big Pond and Otis Reservoir
Unna-51-OtisUnnamed tributary between Big Pond and Otis Reservoir
Unna-186-OtisUnnamed tributary between Big Pond and Otis Reservoir6/13/202236.4

Unna-186-OtisUnnamed tributary between Big Pond and Otis Reservoir6/27/2022>2419.6
Unna-186-OtisUnnamed tributary between Big Pond and Otis Reservoir
Unna-186-OtisUnnamed tributary between Big Pond and Otis Reservoir
Unna-186-OtisUnnamed tributary between Big Pond and Otis Reservoir
Unna-186-OtisUnnamed tributary between Big Pond and Otis Reservoir

SANDISFIELD

SITE IDSTREAM NAMECollection Date
E.Coli Colonies/100 ML
Bent-526-SandisfieldBenton Brook6/13/20221.0
Bent-526-SandisfieldBenton Brook6/27/202220.3
Bent-526-SandisfieldBenton Brook
Bent-526-SandisfieldBenton Brook
Bent-526-SandisfieldBenton Brook
Bent-526-SandisfieldBenton Brook
Bent-526-SandisfieldBenton Brook
Sand-15350-SandisfieldSandy Brook 6/13/202246.5
Sand-15350-SandisfieldSandy Brook 6/27/202216
Sand-15350-SandisfieldSandy Brook
Sand-15350-SandisfieldSandy Brook
Sand-15350-SandisfieldSandy Brook
Sand-15350-SandisfieldSandy Brook
Sand-15350-SandisfieldSandy Brook
Buck-1030-SandisfieldBuck River6/13/20229.8

Buck-1030-SandisfieldBuck River6/27/202212.2
Buck-1030-SandisfieldBuck River
Buck-1030-SandisfieldBuck River
Buck-1030-SandisfieldBuck River
Buck-1030-SandisfieldBuck River
Buck-1030-SandisfieldBuck River
Silv-877-SandisfieldSilver Brook6/13/202244.8
Silv-877-SandisfieldSilver Brook6/27/2022101.7
Silv-877-SandisfieldSilver Brook
Silv-877-SandisfieldSilver Brook
Silv-877-SandisfieldSilver Brook
Silv-877-SandisfieldSilver Brook
Clam-2000-SandisfieldClam River6/13/202246.5
Clam-2000-SandisfieldClam River6/27/202244.3
Clam-2000-SandisfieldClam River
Clam-2000-SandisfieldClam River
Clam-2000-SandisfieldClam River
Clam-2000-SandisfieldClam River
WBFR-5680-SandisfieldWest Branch Farmington River6/13/202224.6
WBFR-5680-SandisfieldWest Branch Farmington River6/27/202212
WBFR-5680-SandisfieldWest Branch Farmington River
WBFR-5680-SandisfieldWest Branch Farmington River
WBFR-5680-SandisfieldWest Branch Farmington River
WBFR-5680-SandisfieldWest Branch Farmington River
WBFR-5680-SandisfieldWest Branch Farmington River

TOLLAND

SITE IDSTREAM NAMECollection DateE.Coli Colonies/100 ML
WBFR-727-TollandWest Branch Farmington River6/13/202236.9
WBFR-727-TollandWest Branch Farmington River6/27/202259.1
WBFR-727-TollandWest Branch Farmington River
WBFR-727-TollandWest Branch Farmington River
WBFR-727-TollandWest Branch Farmington River
WBFR-727-TollandWest Branch Farmington River
WBFR-727-TollandWest Branch Farmington River

GRANVILLE

SITE IDSTREAM NAMECollection DateE.Coli Colonies/100 ML
Hubb-1460-GranvilleHubbard River6/13/202222.8
Hubb-1460-GranvilleHubbard River6/27/202224.6
Hubb-1460-GranvilleHubbard River
Hubb-1460-GranvilleHubbard River
Hubb-1460-GranvilleHubbard River
Hubb-1460-GranvilleHubbard River