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Tap water quality report

Watertown Water & Sewer Authority

EPA monitoring tested this supplier for 44 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

44
contaminants tested
12
detected
9,972
people served
40
health-based violations
Connecticut rankingsLead in ConnecticutPFAS in Connecticut
Water source
SWP
Ownership
Local government
Counties served
Litchfield

Compliance record

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.

40
health-based violations
136
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2006-10-01 → 2006-12-31
MCL Health-based Resolved 2006-10-01 → 2006-12-31
MCL Health-based Resolved 2006-10-01 → 2006-12-31
MCL Health-based Resolved 2006-10-01 → 2006-12-31
MCL Health-based Resolved 2006-07-01 → 2006-09-30
MCL Health-based Resolved 2006-07-01 → 2006-09-30
MCL Health-based Resolved 2006-07-01 → 2006-09-30
MCL Health-based Resolved 2006-07-01 → 2006-09-30
MCL Health-based Resolved 2006-01-01 → 2006-03-31
MCL Health-based Resolved 2006-01-01 → 2006-03-31

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
11.5 µg/L
No EPA limit set
 131/131 SYR4 2012–2019
Chloroform
87.6 µg/L
No EPA limit set
 131/131 SYR4 2012–2019
Dichloroacetic Acid
28.4 µg/L
No EPA limit set
 131/131 SYR4 2012–2019
TTHM
99.8 µg/L 125%
of the EPA limit, in the worst sample — 80 µg/L
 131/131 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
67.1 µg/L 112%
of the EPA limit, in the worst sample — 60 µg/L
 131/131 SYR4 2012–2019
Trichloroacetic Acid
39.7 µg/L
No EPA limit set
 131/131 SYR4 2012–2019
Dibromochloromethane
1.3 µg/L
No EPA limit set
 118/131 SYR4 2012–2019
Monochloroacetic Acid
2.5 µg/L
No EPA limit set
 118/131 SYR4 2012–2019
Copper
840 µg/L 65%
of the EPA limit 1300 µg/L
 42/42 SYR4 2015–2018
Lead
16 µg/L 107%
of the EPA limit, in the worst sample — 15 µg/L
 15/42 SYR4 2015–2018
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2024
Dibromoacetic Acid
0.9000 µg/L
No EPA limit set
 4/131 SYR4 2012–2019
32 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaBromoformHfpo-DaMonobromoacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact
LUKOWSKI, GERALD
Phone
860-945-5299
Email
lukowski@watertownct.org

Frequently asked questions about Watertown Water & Sewer Authority

Is Watertown Water & Sewer Authority tap water safe to drink?

EPA monitoring detected 12 contaminants in Watertown Water & Sewer Authority'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 Watertown Water & Sewer Authority's water?

EPA monitoring detected Bromodichloromethane, Chloroform, Dichloroacetic Acid, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Watertown Water & Sewer Authority serve?

Watertown Water & Sewer Authority reports serving 9,972 people in Connecticut, per its EPA record.

Has Watertown Water & Sewer Authority had any water quality violations?

The EPA has 136 violations on file for Watertown Water & Sewer Authority, of which 40 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.