Is Hinsdale, MA Tap Water Safe? Quality & Contaminants

What was found in Hinsdale'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	116 µg/L 1.2% of the EPA limit 10000 µg/L Main supplier: HINSDALE WATER DEPT · 1,000 people · 2019 Highest in the city: 1300 µg/L — SOUTH ASHMERE WATER ASSOCIATION INC · 150 people · 2019	4/4	SYR4
Fluoride	259 µg/L 6.5% of the EPA limit 4000 µg/L Highest in the city: BISSELVILLE ESTATE · 74 people · 2017	1/4	SYR4
Chloroform	49.17 µg/L No EPA limit set Main supplier: HINSDALE WATER DEPT · 1,000 people · 2019	1/4	SYR4
Total Haloacetic Acids (HAA5)	48.54 µg/L 81% of the EPA limit 60 µg/L Main supplier: HINSDALE WATER DEPT · 1,000 people · 2019	1/4	SYR4
TTHM	46.3725 µg/L 58% of the EPA limit 80 µg/L Main supplier: HINSDALE WATER DEPT · 1,000 people · 2019	1/4	SYR4
Trichloroacetic Acid	32.13 µg/L No EPA limit set Main supplier: HINSDALE WATER DEPT · 1,000 people · 2019	1/4	SYR4
Dichloroacetic Acid	25.06 µg/L No EPA limit set Main supplier: HINSDALE WATER DEPT · 1,000 people · 2019	1/4	SYR4
Barium	15.955 µg/L 0.8% of the EPA limit 2000 µg/L Highest in the city: BISSELVILLE ESTATE · 74 people · 2017	1/4	SYR4
Bromodichloromethane	3.145 µg/L No EPA limit set Main supplier: HINSDALE WATER DEPT · 1,000 people · 2019	1/4	SYR4
Monochloroacetic Acid	1.58 µg/L No EPA limit set Main supplier: HINSDALE WATER DEPT · 1,000 people · 2019	1/4	SYR4
Di(2-ethylhexyl) Phthalate	0.9800 µg/L 16% of the EPA limit 6 µg/L Highest in the city: SOUTH ASHMERE WATER ASSOCIATION INC · 150 people · 2018	1/4	SYR4
Monobromoacetic Acid	0.5200 µg/L No EPA limit set Main supplier: HINSDALE WATER DEPT · 1,000 people · 2019	1/4	SYR4
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: HINSDALE WATER DEPT · 1,000 people · 2023 Highest in the city: 0.0069 mg/L — ASHMERE WATER SERVICE · 66 people · 2025	4/4	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 Hinsdale

Supplier	Population served
HINSDALE WATER DEPT	1,000
SOUTH ASHMERE WATER ASSOCIATION INC	150
BISSELVILLE ESTATE	74
ASHMERE WATER SERVICE	66

Frequently asked questions about Hinsdale tap water

Is Hinsdale tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Hinsdale. 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 Hinsdale?

4 public water suppliers report drinking-water monitoring for Hinsdale, Massachusetts to the EPA. Each is listed above with its population served.

What contaminants are in Hinsdale's water?

The contaminants EPA monitoring detected in Hinsdale include Nitrate, Fluoride, Chloroform, Total Haloacetic Acids (HAA5), TTHM. 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.