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Water system · PWSID MO3010181

CITY OF COLUMBIA UTILITIES

COLUMBIA, MO · ~126,254 people served

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

PWSID

MO3010181

State

Missouri

City

COLUMBIA

Population served

126,254

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

21,400 ppt

limit —

No federal limit

Violations & enforcement

6

Violations on record

2

Unaddressed

3

Health-based

5

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2023. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Sep 2025 Unaddressed
Reporting · EPA contaminant 5200 began Jul 2025 Unaddressed
Monitoring & reporting · Lead & Copper Rule began Jul 2022 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2008 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2008 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2007 Resolved

Recent enforcement actions

  • State action · SOX Jun 2023
  • State action · SIF Apr 2023
  • State action · SIE Sep 2022
  • State action · SIA Sep 2022
  • State action · SOX Aug 2008

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

3 stations · latest Nov 2024

0.01 · max 0.136 mg/L · 36

Fluoride

2 stations · latest Aug 2023

0.35 · max 1.01 mg/l · 15

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 MO3010181 — 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.