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Water system · PWSID OH2101412

DEL-CO WATER COMPANY, INC.

DELAWARE, OH · ~150,000 people served

Check your exact address → DELAWARE overview

Excellent

PurityRadar safety score

PWSID

OH2101412

State

Ohio

City

DELAWARE

Population served

150,000

Primary source

Surface water

Score history

▼ 9 points — the score moved from 100 to 91 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 91

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 Apr 2024). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

4.2 ppt

limit 4 ppt

Above EPA limit · 1.0×

Lithium

12,900 ppt

limit —

No federal limit

PFBA

8.2 ppt

limit —

No federal limit

PFHxA

6.2 ppt

limit —

No federal limit

PFPeA

5.4 ppt

limit —

No federal limit

PFBS

3.8 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2015. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jan 2014 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2012 Resolved

Monitoring & reporting · EPA contaminant 2051 began May 2001 Resolved

Monitoring & reporting · EPA contaminant 2037 began May 2001 Resolved

Monitoring & reporting · EPA contaminant 2050 began May 2001 Resolved

Monitoring & reporting · EPA contaminant 2037 began Aug 1998 Resolved

Monitoring & reporting · EPA contaminant 2051 began Aug 1998 Resolved

Monitoring & reporting · EPA contaminant 2050 began Aug 1998 Resolved

Monitoring & reporting · EPA contaminant 2035 began May 1998 Resolved

Monitoring & reporting · Chlorite began May 1998 Resolved

Monitoring & reporting · EPA contaminant 2033 began May 1998 Resolved

Monitoring & reporting · EPA contaminant 2010 began May 1998 Resolved

Recent enforcement actions

State action · SOX Jan 2015
State action · SIF Aug 2014
State action · SIA Jul 2014
State action · SIE Jul 2014
State action · SOX Jul 2013
State action · SIE Jan 2013
State action · SIA Jan 2013
EPA/federal action · EOX Nov 2009

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

51 stations · latest Sep 2024

56.4 · max 1,690 ug/L · 469

Arsenic

49 stations · latest Sep 2024

3.28 · max 15.2 ug/L · 387

Copper

38 stations · latest Dec 2024

2.42 · max 10.3 ug/L · 204

Lead

3 stations · latest Sep 2024

2.25 · max 6.81 ug/L · 7

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 OH2101412 — 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.