MARION CO. RURAL WATER DISTRICT

KNOXVILLE, IA · ~5,687 people served

Check your exact address → KNOXVILLE overview

100

Excellent

PurityRadar safety score

PWSID

IA6342711

State

Iowa

City

KNOXVILLE

Population served

5,687

Primary source

GWP

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

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

Lithium

85,000 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2025. Official EPA record →

Other · EPA contaminant 7500 began Jan 2025 Unaddressed

Monitoring & reporting · Nitrite began Oct 2023 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jun 1992 Resolved

Recent enforcement actions

State action · SOX Jul 2025
State action · SIA Jun 2025
State action · SO6 Jun 2025
State action · SFJ Jun 2025
State action · SIE Oct 2024
State action · SFJ Oct 2024
State action · SOX Oct 1995
State action · SFJ Jul 1992

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

Copper

3 stations · latest Apr 2025

1.4 · max 25 ug/L · 182

Arsenic

3 stations · latest Mar 2020

1.05 · max 1.3 ug/L · 6

Lead

3 stations · latest Mar 2020

0.1 · max 0.16 ug/L · 6

Atrazine

3 stations · latest Mar 2025

1.2 · max 1.7 ug/L · 5

Nitrate

1 station · latest Jun 2021

1.49 · max 1.49 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 IA6342711 — 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.