Knox, PA Tap Water Quality 2026

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

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

Main Utility: Huefner Spring Water PWSID: PA6160039 Updated: 2026 Q2

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Lead above the federal action level

Lead is 83.50 ppb, 557% of the action level. PFAS has never been sampled at this system.

Knox earns an F for water quality

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

Lead: 83.50 ppb — 557% of the federal action level

PFAS never sampled at this system

2 violations since 2015, 1 health-based

1 violation currently open

Knox's lead level vs. all Pennsylvania community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 83.50 ppb — 100% of the federal action level

✓ Lower lead than 1% of Pennsylvania utilities

Population Served

503

~60 connections

Water Source

Groundwater

Drawn from wells — SDWIS source code GW

Active Violations

1 open of 2 since 2015

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

100% of EPA action level

83.50 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.

185.9% of EPA action level

2,417 ppb

Action level: 1,300 ppb

The 90th-percentile lead result is 83.50 ppb, 557% 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)

Contaminant	Type	Measured	Limit	Period	Status
Lead and Copper Rule	TREATMENT TECHNIQUE	—	TT	2025	Unaddressed
Hexachlorocyclopentadiene	MONITORING AND REPORTING	—	0.05 mg/L	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

1 violation remains open, out of 2 recorded since 2015 (1 health-based).

About the Main Water System

Utility Huefner Spring Water

PWSID PA6160039

Water source Groundwater — Drawn from wells — SDWIS source code GW

Population served 503

Service connections 60

Systems serving this area 2

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Knox tap water safe to drink? ▼

No federal limit is exceeded on record. 1 violation(s) remain open. Lead is 83.50 ppb, 557% of the action level.

Does Knox 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 Knox? ▼

Huefner Spring Water (PWSID PA6160039), 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 2026-02-13. Inspectors recorded 2 significant deficiencies.

What Should Knox Residents Do?

Consider a filter certified for lead

Look for NSF/ANSI 53 certification for lead reduction.

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.

Follow the open violation

This system has an unresolved violation. Contact the supplier for its corrective-action schedule.

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