EPA monitoring tested this supplier for 81 contaminants and detected 3. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.
Formal violations the EPA has on file for this supplier. A
health-based violation means a contaminant limit or a
required treatment was breached; the rest are monitoring or reporting
failures — still violations, but not a measured health risk.
7
health-based violations
56
violations on file
0
still open
Violation
Type
Status
Period
MCL
Health-based
Resolved
2010-08-01 → 2010-08-31
MCL
Health-based
Resolved
2010-08-01 → 2010-08-31
MCL
Health-based
Archived
2009-09-01 → 2009-09-30
MCL
Health-based
Archived
2009-09-01 → 2009-09-30
MCL
Health-based
Archived
2008-12-01 → 2008-12-31
MCL
Health-based
Archived
1999-09-01 → 1999-09-30
MCL
Health-based
Archived
1995-10-01 → 1995-10-31
MR
Monitoring
Archived
1996-04-01 → 1996-06-30
MR
Monitoring
Archived
1996-04-01 → 1996-06-30
MR
Monitoring
Archived
1995-01-01 → 1995-03-31
Other contaminants detected
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
Frequently asked questions about Monson Water and Sewer Dept
Is Monson Water and Sewer Dept tap water safe to drink?
EPA monitoring detected 3 contaminants in Monson Water and Sewer Dept's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Monson Water and Sewer Dept's water?
EPA monitoring detected Nitrate, Lead, TTHM. The full list with the level and data source for each is above.
How many people does Monson Water and Sewer Dept serve?
Monson Water and Sewer Dept reports serving 4,222 people in Massachusetts, per its EPA record.
Has Monson Water and Sewer Dept had any water quality violations?
The EPA has 56 violations on file for Monson Water and Sewer Dept, of which 7 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.