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Halfmoon, PA Tap Water Quality 2026

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

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

Main Utility: Upper Halfmoon Water PWSID: PA4140109 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 3.00 ppb, 20% of the action level and no violations are open. PFAS has never been sampled at this system.

B

Halfmoon earns a B for water quality

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

Lead: 3.00 ppb — 20% of the federal action level
PFAS never sampled at this system
21 violations since 2015, 0 health-based
No violations currently open
Halfmoon's lead level vs. all Pennsylvania community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 3.00 ppb — 20% of the federal action level
✓ Lower lead than 58% of Pennsylvania utilities
Population Served
1828
~618 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
21 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
20% of EPA action level
3.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 3.00 ppb, 20% 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.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Groundwater Rule MONITORING AND REPORTING — — 2017 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2017 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2017 Resolved
Endrin MONITORING AND REPORTING — 0.002 mg/L 2017 Resolved
BHC-GAMMA MONITORING AND REPORTING — 0.0002 mg/L 2017 Resolved
Methoxychlor MONITORING AND REPORTING — 0.04 mg/L 2017 Resolved
Di(2-ethylhexyl) adipate MONITORING AND REPORTING — 0.4 mg/L 2017 Resolved
Simazine MONITORING AND REPORTING — 0.004 mg/L 2017 Resolved
Di(2-ethylhexyl) phthalate MONITORING AND REPORTING — 0.006 mg/L 2017 Resolved
Hexachlorocyclopentadiene MONITORING AND REPORTING — 0.05 mg/L 2017 Resolved
Atrazine MONITORING AND REPORTING — 0.003 mg/L 2017 Resolved
LASSO MONITORING AND REPORTING — — 2017 Resolved
Heptachlor MONITORING AND REPORTING — 0.0004 mg/L 2017 Resolved
Heptachlor epoxide MONITORING AND REPORTING — 0.0002 mg/L 2017 Resolved
HEXACHLOROBENZENE MONITORING AND REPORTING — 0.001 mg/L 2017 Resolved
Benzo(a)pyrene MONITORING AND REPORTING — 0.0002 mg/L 2017 Resolved
Chlordane MONITORING AND REPORTING — 0.002 mg/L 2017 Resolved
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2016 Resolved
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2016 Resolved
Radium-226 MONITORING AND REPORTING — — 2016 Resolved
Radium-228 MONITORING AND REPORTING — — 2016 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

21 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Upper Halfmoon Water
PWSID PA4140109
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 1,828
Service connections 618
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Halfmoon tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 3.00 ppb, 20% of the action level.
Does Halfmoon 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 Halfmoon? ▼
Upper Halfmoon Water (PWSID PA4140109), one of 2 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-05-05. No significant deficiencies were recorded.

What Should Halfmoon Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
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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