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Tap water quality report

Windham, CT

EPA monitoring detected 18 contaminants across the 3 water suppliers serving Windham. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

3
water suppliers
21,661
people served
18
contaminants found
Connecticut rankings Lead in Connecticut PFAS in Connecticut

What was found in Windham's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
1263.9999999999995 µg/L 32%
of the EPA limit 4000 µg/L
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
3/3 SYR4
Chlorite
752.5 µg/L 75%
of the EPA limit 1000 µg/L
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
1/3 SYR4
Nitrate
240 µg/L 2.4%
of the EPA limit 10000 µg/L
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
Highest in the city: 500 µg/L — DOUGLAS MANOR · 135 people · 2019
2/3 SYR4
Nitrate-Nitrite
240 µg/L 2.4%
of the EPA limit 10000 µg/L
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
Highest in the city: 451.99999999999994 µg/L — DOUGLAS MANOR · 135 people · 2019
2/3 SYR4
Copper
110 µg/L 8.5%
of the EPA limit 1300 µg/L
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
Highest in the city: 451.1999999999998 µg/L — DOUGLAS MANOR · 135 people · 2019
3/3 SYR4
TTHM
81.755 µg/L 102%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
1/3 SYR4
Chloroform
65.5 µg/L
No EPA limit set
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
2/3 SYR4
Total Haloacetic Acids (HAA5)
28 µg/L 47%
of the EPA limit 60 µg/L
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
1/3 SYR4
Dichloroacetic Acid
18 µg/L
No EPA limit set
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
1/3 SYR4
Bromodichloromethane
14 µg/L
No EPA limit set
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
2/3 SYR4
Lead
14 µg/L 93%
of the EPA limit 15 µg/L
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
3/3 SYR4
Trichloroacetic Acid
14 µg/L
No EPA limit set
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
1/3 SYR4
Barium
9.25 µg/L 0.5%
of the EPA limit 2000 µg/L
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
2/3 SYR4
Dibromochloromethane
3.9 µg/L
No EPA limit set
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
1/3 SYR4
Monochloroacetic Acid
3.45 µg/L
No EPA limit set
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2019
1/3 SYR4
Picloram
0.1260 µg/L 0%
of the EPA limit 500 µg/L
Highest in the city: WYNDHAM PARK APARTMENTS · 312 people · 2019
1/3 SYR4
Lead
0.0043 mg/L 29%
of the EPA limit 0.0150 mg/L
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2025
Highest in the city: 0.0221 mg/L — DOUGLAS MANOR · 135 people · 2025
3/3 LCR
Pfhxa
0.0034 µg/L
No EPA limit set
Main supplier: WINDHAM WATER WORKS · 21,214 people · 2024
1/3 UCMR-5
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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Windham

SupplierPopulation served
WINDHAM WATER WORKS 21,214
WYNDHAM PARK APARTMENTS 312
DOUGLAS MANOR 135

Frequently asked questions about Windham tap water

Is Windham tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Windham. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Windham?

3 public water suppliers report drinking-water monitoring for Windham, Connecticut to the EPA. Each is listed above with its population served.

What contaminants are in Windham's water?

The contaminants EPA monitoring detected in Windham include Fluoride, Chlorite, Nitrate, Nitrate-Nitrite, Copper. The full list, with the level at the main supplier and the data source, is in the table above.

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.