POTTAWATOMIE CO RWD 3

ONAGA, KS · ~1,455 people served

Check your exact address → ONAGA overview

100

Excellent

PurityRadar safety score

PWSID

KS2014904

State

Kansas

City

ONAGA

Population served

1,455

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 Jun 2022. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Dec 2020 Resolved

Max contaminant level (MCL) · Total coliform health-based began Aug 2002 Resolved

Max contaminant level (MCL) · Total coliform health-based began Apr 1998 Resolved

Monitoring & reporting · Total coliform began Jun 1995 Resolved

Monitoring & reporting · Total coliform began Jul 1994 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 1994 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Monitoring & reporting · Total coliform began Sep 1992 Resolved

Recent enforcement actions

State action · SIA Jun 2022
State action · SOX Jun 2022
State action · SIF Oct 2002
State action · SOX Sep 2002
State action · SIA Sep 2002
State action · SIE Sep 2002
State action · SOX May 1998
State action · SIF May 1998

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

Nitrate

1 station · latest Aug 2023

2.77 · max 10.7 mg/l as N · 54

Atrazine

1 station · latest Jun 2023

414 · max 807 ng/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 KS2014904 — 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.