Is Halfmoon, NY tap water safe?
Data: U.S. EPA · How we read the data · How we check it
Summary
No federal limits exceeded in EPA data for Halfmoon Water District (TROY).
Halfmoon Water District (TROY) supplies Halfmoon (15,000 people).
Water system
Halfmoon Water District (TROY)
15,000 people · Purchased surface water · EPA ID NY4519111
Buys treated water from Troy City Public Water System, Waterford Water Works (Purchase Troy).
| PFAS | Highest average | Limit |
|---|---|---|
| PFOA Not detected | – | 4 ppt |
| PFOS Not detected | – | 4 ppt |
| PFHxS Not detected | – | 10 ppt |
| PFNA Not detected | – | 10 ppt |
| HFPO-DA (GenX) Not detected | – | 10 ppt |
ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.
Lead: 2.4 ppb at the 90th percentile (Dec 2025, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0
Across New York, 31 of 322 water systems EPA tested had PFAS above a 2024 federal limit, and 16 systems were above the lead action level in results from the last five years. New York results.
Halfmoon homes and lead pipes
Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. Renting? Ask your landlord what the service line is made of, because it's their pipe to replace. How to check your own line.
Housing: Census American Community Survey 2020–2024 5-year estimates for Halfmoon town (tables B25034, B25003). Estimates for small places have a margin of error.
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Clifton Park 5 mi Clifton Park Water Authority | None above limits | 1 ppb |
| Colonie 9 mi Latham Water District | None above limits | 2 ppb |
| Troy 9 mi Troy City Public Water System | None above limits | 110 ppb |
| Schenectady 11 mi Schenectady City Water Works | None above limits | 3 ppb |
| Glenville 13 mi Glenville Water District #11 | None above limits | 4.1 ppb |
| Albany 14 mi Albany City Water System | None above limits | 13 ppb |
Halfmoon ZIP codes (3)
- 12065
- 12118
- 12188
Questions
Is Halfmoon tap water safe to drink?
Halfmoon Water District (TROY) has had no health-based violations since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.
Who supplies water in Halfmoon, NY?
Halfmoon Water District (TROY), which serves 15,000 people.
Does Halfmoon tap water have PFAS?
None detected above EPA's reporting limits. Halfmoon Water District (TROY) had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.
Do Halfmoon homes have lead pipes?
Census estimates put 24% of Halfmoon homes as built before 1980 (New York: 74%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. Halfmoon Water District (TROY)'s service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.