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Water system · PWSID PA4110077

BLACKLICK VALLEY MUNI AUTH

TWIN ROCKS, PA · ~1,650 people served

Check your exact address → TWIN ROCKS overview
100
Excellent
PurityRadar safety score

PWSID

PA4110077

State

Pennsylvania

City

TWIN ROCKS

Population served

1,650

Primary source

SWP

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

43

Violations on record

2

Unaddressed

20

Health-based

121

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2026. Official EPA record →

Other · EPA contaminant 7500 began Feb 2021 Unaddressed
Other · EPA contaminant 7500 began Nov 2009 Unaddressed
Other · EPA contaminant 7500 began Nov 2025 Resolved
Other · EPA contaminant 7500 began Oct 2025 Resolved
Treatment technique · EPA contaminant 0200 health-based began Aug 2025 Resolved
Monitoring · Lead & Copper Rule began Oct 2024 Resolved
Monitoring · Lead & Copper Rule began Jul 2023 Resolved
Other · EPA contaminant 7500 began Oct 2020 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Oct 2020 Resolved
Other · EPA contaminant 7500 began Aug 2020 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2020 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Oct 2019 Resolved

Recent enforcement actions

  • State action · SOX Jan 2026
  • State action · SIF Jan 2026
  • State action · SOX Jan 2026
  • State action · SIA Jan 2026
  • State action · SIE Jan 2026
  • State action · SOX Oct 2025
  • State action · SIF Oct 2025
  • State action · SIF Oct 2025

This profile is built from EPA public records for system PA4110077 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.