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Water system · PWSID MO3024058

BOONE COUNTY PWSD 9

COLUMBIA, MO · ~15,035 people served

Check your exact address → COLUMBIA overview
100
Excellent
PurityRadar safety score

PWSID

MO3024058

State

Missouri

City

COLUMBIA

Population served

15,035

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

Latest detections from EPA’s UCMR5 monitoring (through Nov 2024). Levels in parts per trillion (ppt).

Lithium

26,800 ppt

limit —

No federal limit

Violations & enforcement

33

Violations on record

0

Unaddressed

30

Health-based

28

Enforcement actions

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

Reporting · Lead & Copper Rule began Aug 2025 Resolved
Reporting · Lead & Copper Rule began Sep 2024 Resolved
Monitoring & reporting · EPA contaminant 3014 began Sep 2021 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2005 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Oct 2005 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Jul 2005 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2005 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2005 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Apr 2005 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Jan 2005 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2005 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2004 Resolved

Recent enforcement actions

  • State action · SOX Nov 2025
  • State action · SOX Oct 2025
  • State action · SIF Oct 2025
  • State action · SIE Sep 2025
  • State action · SIA Sep 2025
  • State action · SOX Jan 2025
  • State action · SIF Dec 2024
  • State action · SIA Oct 2024

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

11 stations · latest Mar 2024

1.38 · max 2.3 ug/L · 30

Manganese

11 stations · latest Mar 2024

367 · max 4,380 ug/L · 30

Arsenic

8 stations · latest Mar 2024

0.8 · max 1.46 ug/L · 17

Nitrate

1 station · latest Jul 2023

0.0183 · max 0.221 mg/L · 12

Lead

1 station · latest Sep 2023

0.56 · max 0.56 ug/L · 1

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 MO3024058 — 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.