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Tap water quality report

Halfmoon, NY

EPA monitoring detected 11 contaminants across the 1 water supplier serving Halfmoon. 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.

1
water supplier
15,000
people served
11
contaminants found
New York rankings Lead in New York PFAS in New York

What was found in Halfmoon'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
TTHM
106.52 µg/L 133%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: HALFMOON WATER DISTRICT (TROY) · 15,000 people · 2019
1/1 SYR4
Chloroform
95.05999999999997 µg/L
No EPA limit set
Main supplier: HALFMOON WATER DISTRICT (TROY) · 15,000 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
60.01499999999999 µg/L 100%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
Main supplier: HALFMOON WATER DISTRICT (TROY) · 15,000 people · 2019
1/1 SYR4
Trichloroacetic Acid
33 µg/L
No EPA limit set
Main supplier: HALFMOON WATER DISTRICT (TROY) · 15,000 people · 2019
1/1 SYR4
Dichloroacetic Acid
27.729999999999997 µg/L
No EPA limit set
Main supplier: HALFMOON WATER DISTRICT (TROY) · 15,000 people · 2019
1/1 SYR4
Bromodichloromethane
10.65 µg/L
No EPA limit set
Main supplier: HALFMOON WATER DISTRICT (TROY) · 15,000 people · 2019
1/1 SYR4
Monochloroacetic Acid
3.508499999999998 µg/L
No EPA limit set
Main supplier: HALFMOON WATER DISTRICT (TROY) · 15,000 people · 2019
1/1 SYR4
Monobromoacetic Acid
3.4999999999999987 µg/L
No EPA limit set
Main supplier: HALFMOON WATER DISTRICT (TROY) · 15,000 people · 2019
1/1 SYR4
Dibromoacetic Acid
2.159 µg/L
No EPA limit set
Main supplier: HALFMOON WATER DISTRICT (TROY) · 15,000 people · 2019
1/1 SYR4
Dibromochloromethane
1.5799999999999983 µg/L
No EPA limit set
Main supplier: HALFMOON WATER DISTRICT (TROY) · 15,000 people · 2019
1/1 SYR4
Lead
0.0024 mg/L 16%
of the EPA limit 0.0150 mg/L
Main supplier: HALFMOON WATER DISTRICT (TROY) · 15,000 people · 2025
1/1 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 Halfmoon

SupplierPopulation served
HALFMOON WATER DISTRICT (TROY) 15,000

Frequently asked questions about Halfmoon tap water

Is Halfmoon tap water safe to drink?

EPA testing detected 11 contaminants in the water serving Halfmoon. 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 Halfmoon?

1 public water supplier report drinking-water monitoring for Halfmoon, New York to the EPA. Each is listed above with its population served.

What contaminants are in Halfmoon's water?

The contaminants EPA monitoring detected in Halfmoon include TTHM, Chloroform, Total Haloacetic Acids (HAA5), Trichloroacetic Acid, Dichloroacetic Acid. 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.