KINGS RIVER BEACH WATER ASSOCIATION INC

SHELL KNOB, MO · ~50 people served

Check your exact address → SHELL KNOB overview

100

Excellent

PurityRadar safety score

PWSID

MO5031309

State

Missouri

City

SHELL KNOB

Population served

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 2021. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Dec 2005 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jun 2005 Resolved

Max contaminant level (MCL) · Total coliform health-based began Aug 2004 Resolved

Max contaminant level (MCL) · Total coliform health-based began May 2004 Resolved

Max contaminant level (MCL) · Total coliform health-based began Nov 2003 Resolved

Max contaminant level (MCL) · Total coliform health-based began Sep 2003 Resolved

Other · EPA contaminant 7000 began Jul 2003 Resolved

Monitoring & reporting · Thallium began Jan 2003 Resolved

Other · EPA contaminant 7000 began Jul 2002 Resolved

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

Monitoring & reporting · Thallium began Jan 2002 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 2001 Resolved

Recent enforcement actions

State action · SOX Feb 2021
State action · SOX Jan 2014
State action · SOX Jan 2014
State action · SIF Jan 2006
State action · SIE Jan 2006
State action · SIA Jan 2006
State action · SOX Sep 2005
State action · SOX Sep 2005

This profile is built from EPA public records for system MO5031309 — 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.