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Water system · PWSID OH5703512

DAYTON PUBLIC WATER SYSTEM

DAYTON, OH · ~141,407 people served

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Fair

PurityRadar safety score

PWSID

OH5703512

State

Ohio

City

DAYTON

Population served

141,407

Primary source

Surface water

Score history

▼ 32 points — the score moved from 100 to 68 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 68

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

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Dec 2023). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

7.3 ppt

limit 4 ppt

Above EPA limit · 1.8×

PFHxS

Perfluorohexanesulfonic acid

7 ppt

limit 10 ppt

Near EPA limit

PFHxA

3.1 ppt

limit —

No federal limit

PFBS

3 ppt

limit —

No federal limit

PFPeA

3 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Apr 2024. Official EPA record →

Treatment technique · EPA contaminant 0200 health-based began May 2009 Resolved

Monitoring & reporting · EPA contaminant 0200 began Jan 2005 Resolved

Monitoring & reporting · EPA contaminant 0200 began Dec 2004 Resolved

Monitoring & reporting · EPA contaminant 0200 began Jul 2003 Resolved

Monitoring & reporting · EPA contaminant 2050 began May 2002 Resolved

Monitoring & reporting · EPA contaminant 2037 began May 2002 Resolved

Monitoring & reporting · EPA contaminant 2051 began May 2002 Resolved

Monitoring & reporting · EPA contaminant 2037 began May 2001 Resolved

Monitoring & reporting · EPA contaminant 2050 began May 2001 Resolved

Monitoring & reporting · EPA contaminant 2051 began May 2001 Resolved

Other · EPA contaminant 7000 began Jul 2000 Resolved

Monitoring & reporting · Gross alpha began Jul 1994 Resolved

Recent enforcement actions

EPA/federal action · EFJ Apr 2024
State action · SOX Jun 2009
State action · SIE Jun 2009
State action · SIA Jun 2009
State action · SOX Feb 2008
State action · SOX Apr 2007
State action · SOX Apr 2007
State action · SIE Feb 2005

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Manganese

4 stations · latest Dec 2024

21.6 · max 178 ug/L · 39

Arsenic

3 stations · latest Nov 2024

2.48 · max 3.08 ug/L · 20

Copper

3 stations · latest Nov 2024

2.52 · max 6.87 ug/L · 17

Atrazine

1 station · latest Sep 2023

71.7 · max 121 ng/l · 2

Fluoride

1 station · latest Sep 2023

0.25 · max 0.25 mg/l · 2

Lead

1 station · latest Apr 2024

5.84 · max 7.55 ug/L · 2

Nitrate

1 station · latest Dec 2022

2.49 · max 2.49 mg/l as N · 2

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system OH5703512 — 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.