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Water system · PWSID NC0136231

KNOLLWOOD S/D

100
Excellent
PurityRadar safety score

PWSID

NC0136231

State

North Carolina

City

CARY

Population served

46

Primary source

Groundwater

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

11

Violations on record

0

Unaddressed

1

Health-based

41

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2011. Official EPA record →

Other · EPA contaminant 7000 began Jul 2011 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2003 Resolved
Treatment technique · Lead & Copper Rule health-based began Jan 2002 Resolved
Monitoring & reporting · Fluoride began Jul 1985 Resolved
Monitoring & reporting · Selenium began Jul 1985 Resolved
Monitoring & reporting · Antimony began Jul 1985 Resolved
Monitoring & reporting · Nitrate began Jul 1985 Resolved
Monitoring & reporting · Barium began Jul 1985 Resolved
Monitoring & reporting · Chromium (total) began Jul 1985 Resolved
Monitoring & reporting · Arsenic began Jul 1985 Resolved
Monitoring & reporting · Cadmium began Jul 1985 Resolved

Recent enforcement actions

  • State action · SOX Jul 2011
  • State action · SO6 Jun 2010
  • State action · SOX Jun 2010
  • State action · SOX Jan 2006
  • State action · SOX Sep 2005
  • State action · SOX Sep 2005
  • State action · SOX Sep 2005
  • State action · SOX Sep 2005

This profile is built from EPA public records for system NC0136231 — 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.