TWIN CITY WATER AND SEWER DISTRICT PWS

DENNISON, OH · ~9,224 people served

Check your exact address → DENNISON overview

100

Excellent

PurityRadar safety score

PWSID

OH7901711

State

Ohio

City

DENNISON

Population served

9,224

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2020. Official EPA record →

Other · EPA contaminant 7000 began Feb 2020 Unaddressed

Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2013 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2013 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2013 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2013 Resolved

Monitoring & reporting · Bromate began Apr 2005 Resolved

Monitoring & reporting · EPA contaminant 0300 began Mar 2005 Resolved

Monitoring & reporting · EPA contaminant 0300 began Feb 2005 Resolved

Other · EPA contaminant 7000 began Jul 2002 Resolved

Treatment technique · EPA contaminant 0200 health-based began Jul 1994 Resolved

Treatment technique · EPA contaminant 0200 health-based began Jun 1994 Resolved

Monitoring & reporting · EPA contaminant 0200 began Jun 1994 Resolved

Recent enforcement actions

State action · SIA Feb 2020
State action · SIA Aug 2013
State action · SIE Aug 2013
State action · SOX Jul 2013
State action · SOX Jul 2013
State action · SIE May 2013
State action · SIA May 2013
State action · SOX Dec 2007

This profile is built from EPA public records for system OH7901711 — 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.