Nashua, NH Water Quality Report
Is Nashua tap water safe? See PFAS and lead contamination levels for Nashua, New Hampshire. Compare to EPA limits and get filter recommendations.
Quick Answers
Is Nashua, NH tap water safe to drink? Nashua, NH tap water meets most federal EPA limits, but PFAS compounds have been detected at an average of 5.38 ppt across 4 compounds. A certified pitcher filter or reverse osmosis system is recommended for sensitive populations.
What contaminants are in Nashua, NH water? Top PFAS compounds detected in Nashua water: PFOA (8.1 ppt), PFPeA (7.8 ppt), PFHxA (5.4 ppt). See the full table for all monitored contaminants and comparison to EPA limits.
What filter should I use in Nashua, NH? For Nashua, NH households, reverse osmosis removes 90%+ of PFAS, lead, and arsenic. Pitcher and faucet filters certified to NSF-53 for PFAS (ZeroWater, PUR PLUS) work for smaller households. Skip standard Brita filters for PFAS removal.
Nashua, NH Water Quality Summary
EPA testing has detected PFAS "forever chemicals" in Nashua, NH drinking water. Recent monitoring found a peak level of 8.1 ppt across 3 water systems, representing an average of 5.38 ppt across 4 detected compounds. These levels come from individual EPA UCMR 5 water samples (2023-2025). The EPA's 4 ppt limit for PFOA and PFOS is enforced on a running annual average, so a sample above it shows real exposure but is not by itself a violation.
Contamination Level: LOW – Low contamination – PFAS detected but at lower levels; monitoring continues.
Top Detected Compounds
- PFOA: 8.1 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
- PFPeA: 7.8 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
- PFHxA: 5.4 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
- PFHpA: 3 ppt
Lead in Nashua, NH Water
EPA Lead and Copper Rule testing has recorded 27 lead samples for Nashua water systems, with a 90th-percentile high of 0.0044 mg/L (within the EPA 0.015 mg/L action level). There is no safe level of lead for children; if your home was built before 1986, a certified NSF/ANSI 53 lead-removal filter is recommended.
EPA Violations in Nashua, NH
Nashua public water systems have 19 health-based EPA Safe Drinking Water Act violations on record, including Arsenic, Ground Water Rule, Revised Total Coliform Rule, Haloacetic Acids (HAA5), Antimony. Health-based violations mean a contaminant exceeded its federal limit or required treatment was not applied.
About the Data
Source: EPA UCMR5 (Unregulated Contaminant Monitoring Rule 5), the 2023-2025 national testing program spanning about 10,000 public water systems – the broadest PFAS survey ever run in the US. Nashua, NH serves a population of roughly 91,322.
ZIP Codes Served
What Nashua, New Hampshire Residents Should Do
- Enter your exact ZIP code at knowyourexposure.com for address-level data
- Request the latest Consumer Confidence Report (CCR) from your New Hampshire utility – it is free and updated annually
- Choose a filter certified for PFAS: NSF/ANSI 58 reverse osmosis (94-99% removal) or an NSF-53 pitcher
- High-exposure households (pregnancy, infants, immunocompromised) should also consider a PFAS home test kit