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New Castle, NH Tap Water Quality 2026

Water quality report for New Castle, NH — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at New Castle's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: New Castle Water Works PWSID: NH1661010 Updated: 2026 Q2
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Lead above the federal action level

Lead is 17.00 ppb, 113% of the action level and no violations are open. PFAS has never been sampled at this system.

D

New Castle earns a D for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: 17.00 ppb — 113% of the federal action level
PFAS never sampled at this system
14 violations since 2015, 11 health-based
No violations currently open
New Castle's lead level vs. all New Hampshire community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 17.00 ppb — 100% of the federal action level
✓ Lower lead than 65% of New Hampshire utilities
Population Served
982
~365 connections
Water Source
Surface water
Purchased from another system — SDWIS source code SWP
Active Violations
0
14 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
100% of EPA action level
17.00 ppb
Action level: 15 ppb
Copper (Cu)
90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.
111.5% of EPA action level
1,450 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 17.00 ppb, 113% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Lead and Copper Rule MONITORING AND REPORTING — TT 2023 Resolved
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2018 Resolved
TTHM MCL EXCEEDANCE 0.09 MG/L 0.080 mg/L 2018 Resolved
TTHM MCL EXCEEDANCE 0.095 MG/L 0.080 mg/L 2018 Resolved
TTHM MCL EXCEEDANCE 0.097 MG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.094 MG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.085 MG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.087 MG/L 0.080 mg/L 2016 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2016–2017 Resolved
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2016 Resolved
TTHM MCL EXCEEDANCE 0.087 MG/L 0.080 mg/L 2016 Resolved
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2016 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2015 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

14 violations are on record since 2015, of which 11 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility New Castle Water Works
PWSID NH1661010
Water source Surface water — Purchased from another system — SDWIS source code SWP
Population served 982
Service connections 365
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is New Castle tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 17.00 ppb, 113% of the action level.
Does New Castle water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to New Castle? ▼
New Castle Water Works (PWSID NH1661010), one of 2 systems serving this area. Surface water. Purchased from another system — SDWIS source code SWP
When was this system last inspected? ▼
It was last inspected on 2025-01-23. No significant deficiencies were recorded.

What Should New Castle Residents Do?

1
Consider a filter certified for lead
Look for NSF/ANSI 53 certification for lead reduction.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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