B
79

Good Water Quality

Winnisquam, NH 03289

Belknap County · Population served: 65 · Data updated March 2026

Water Systems Serving This Area

🌊
PLEASANT VALLEY PARK ESTATES
Groundwater · Pop. 65
PWSID: NH2223010

Violation History (Last 5 Years)

10Total (5yr)
0Health-Based
4Major

Water Quality Summary

Understanding Your Water in Winnisquam

Tap water quality in Winnisquam, New Hampshire (03289) receives an overall grade of B (Good) with a score of 79 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is roughly in line with the New Hampshire state average of 77. The area is served by Pleasant Valley Park Estates, a groundwater system providing water to approximately 65 people.

Your Score 79/100 B
vs State 2 pts above New Hampshire avg (77)
vs National 4 pts above national avg (75)

What a Grade B Means

A score of 79/100 means the water in Winnisquam, NH is generally good and meets EPA standards, with only minor areas of concern. There may be low levels of detectable contaminants or a small number of non-critical violations. Most residents can feel comfortable with their tap water quality, though basic filtration can provide an extra layer of protection.

Groundwater: drawn from underground aquifers via wells

Common Questions

Frequently Asked Questions

Based on EPA data, tap water in Winnisquam, New Hampshire receives a grade of B (Good) with a score of 79/100. This indicates the water meets federal standards and has relatively few concerns. However, individual homes may still have localized issues such as lead from old plumbing.

ZIP code 03289 is served by 1 water system using groundwater sources, providing water to approximately 65 people. Groundwater is naturally filtered through rock and soil, often requiring less treatment. However, it can be vulnerable to contamination from underground sources like naturally occurring arsenic, nitrates from agriculture, or PFAS from industrial sites.

No lead data is currently available for ZIP code 03289. This may mean lead testing results haven't been reported recently, or the serving water system uses monitoring waivers. You can request a free lead test kit from most water utilities or purchase a certified home testing kit.

No PFAS ("forever chemicals") were detected in water systems serving Winnisquam, New Hampshire during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Winnisquam, New Hampshire have received 10 violations in the last 5 years. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.

Water in Winnisquam, New Hampshire shows no major contaminant concerns based on available data. A basic carbon filter can improve taste and reduce chlorine. For extra peace of mind, an NSF-certified pitcher filter or faucet-mount filter provides an affordable layer of protection.

Explore Nearby

Water Quality in Nearby ZIP Codes