Fair

Charles River 609S (Washington St. Bridge, Newton/Wellesley)

017, MA

Water Quality

Updated Dec 8

Escherichia coli (E. coli) Bacteria10.0 MPN/100mL

Common fecal coliform bacteria indicating possible sewage contamination. EPA recreational limit: <126 MPN/100mL.

Water Temperature0.5 °C

Water temperature directly affects fish metabolism and activity. Optimal range varies by species.

Tn (mg/L) (Water Quality Parameter)1.5

Tn (mg/L) - a water quality measurement. Contact local authorities for specific safety guidelines.

Tp (mg/L) (Water Quality Parameter)0.0

Tp (mg/L) - a water quality measurement. Contact local authorities for specific safety guidelines.

Nh3 (mg/L) (Water Quality Parameter)0.0

Nh3 (mg/L) - a water quality measurement. Contact local authorities for specific safety guidelines.

Water Temperature0.5 °C

Water temperature directly affects fish metabolism and activity. Optimal range varies by species.

Enterococcus Bacteria10.0 CFU/100mL

Fecal indicator bacteria found in intestines. Used to assess water safety for swimming. EPA limit: <35 CFU/100mL.

Ortho P (mg/L) (Water Quality Parameter)0.0

Ortho P (mg/L) - a water quality measurement. Contact local authorities for specific safety guidelines.

Escherichia coli (E. coli) Bacteria10.0 MPN/100mL

Common fecal coliform bacteria indicating possible sewage contamination. EPA recreational limit: <126 MPN/100mL.

recency/

coverage/

parameters present/