F0/100
NORTHWESTERN LANCASTER CO AUTH — Water Quality Report 2026
Serving 2,968 people · Pennsylvania
Water Source
Purchased Surface Water
County
—
System ID
PA7360164
Violations
80
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.37 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2025 – September 30, 2025Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2025 – March 31, 2025Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About NORTHWESTERN LANCASTER CO AUTH
Is NORTHWESTERN LANCASTER CO AUTH water safe to drink?
NORTHWESTERN LANCASTER CO AUTH water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 80 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has NORTHWESTERN LANCASTER CO AUTH detected?
2 contaminants were tested in NORTHWESTERN LANCASTER CO AUTH's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does NORTHWESTERN LANCASTER CO AUTH have any EPA violations?
Yes, NORTHWESTERN LANCASTER CO AUTH has 80 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, Other, MCL. 12 are health-based violations.
How many people does NORTHWESTERN LANCASTER CO AUTH serve?
NORTHWESTERN LANCASTER CO AUTH serves approximately 2,968 people, Pennsylvania.
What type of water does NORTHWESTERN LANCASTER CO AUTH provide?
NORTHWESTERN LANCASTER CO AUTH sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is PA7360164.
How does NORTHWESTERN LANCASTER CO AUTH compare to other utilities in Pennsylvania?
NORTHWESTERN LANCASTER CO AUTH scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Pennsylvania state page for a full comparison of water systems.