Is Windham, NH Tap Water Safe? Quality & Contaminants

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.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	2150 µg/L 22% of the EPA limit 10000 µg/L Highest in the city: GOLDEN BROOK · 328 people · 2019	2/16	SYR4
Copper	84.735 µg/L 6.5% of the EPA limit 1300 µg/L Highest in the city: WHISPERING WINDS · 488 people · 2017	1/16	SYR4
TTHM	26 µg/L 33% of the EPA limit 80 µg/L Highest in the city: WHISPERING WINDS · 488 people · 2017	1/16	SYR4
Chloroform	14 µg/L No EPA limit set Highest in the city: WHISPERING WINDS · 488 people · 2017	1/16	SYR4
Total Haloacetic Acids (HAA5)	8.8 µg/L 15% of the EPA limit 60 µg/L Highest in the city: WHISPERING WINDS · 488 people · 2017	1/16	SYR4
Bromodichloromethane	7.4 µg/L No EPA limit set Highest in the city: WHISPERING WINDS · 488 people · 2017	1/16	SYR4
Dichloroacetic Acid	4.865 µg/L No EPA limit set Highest in the city: WHISPERING WINDS · 488 people · 2017	1/16	SYR4
Dibromochloromethane	4.1 µg/L No EPA limit set Highest in the city: WHISPERING WINDS · 488 people · 2017	1/16	SYR4
Trichloroacetic Acid	2.622 µg/L No EPA limit set Highest in the city: WHISPERING WINDS · 488 people · 2017	1/16	SYR4
Dibromoacetic Acid	1.312 µg/L No EPA limit set Highest in the city: WHISPERING WINDS · 488 people · 2017	1/16	SYR4
Bromoform	0.6000 µg/L No EPA limit set Highest in the city: WHISPERING WINDS · 488 people · 2017	1/16	SYR4
Lead	0.0660 mg/L 440% above the EPA limit of 0.0150 mg/L Highest in the city: CAMELOT III · 33 people · 2016	2/16	LCR

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

Supplier	Population served
W AND E	528
WHISPERING WINDS	488
GOLDEN BROOK	328
LAMPLIGHTER VILLAGE	173
WARDE REHABILITATION/NURSING	155
VILLAGES OF WINDHAM	145
FLETCHER CORNER ESTATES	140
SPRUCE POND ESTS	133
HARDWOOD HTS BIRCH HILL	120
WOOD MEADOW ESTATES	113
WINDHAM TERRACE	110
CASTLE REACH	110
HADLEIGH WOODS	93
WYNRIDGE CONDOS	87
CAMELOT III	33
MCAULEY COMMONS	25

Frequently asked questions about Windham tap water

Is Windham tap water safe to drink?

EPA testing detected 12 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?

16 public water suppliers report drinking-water monitoring for Windham, New Hampshire 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 Nitrate, Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5). 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.