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Water system · PWSID MO4036059

TERRE DU LAC

DES PERES, MO · ~3,200 people served

Check your exact address → DES PERES overview
100
Excellent
PurityRadar safety score

PWSID

MO4036059

State

Missouri

City

DES PERES

Population served

3,200

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

115

Violations on record

1

Unaddressed

84

Health-based

115

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Nov 2020. Official EPA record →

Other · EPA contaminant 7000 began Jul 2012 Unaddressed
Other · EPA contaminant 7000 began Jul 2020 Resolved
Other · EPA contaminant 7500 began Mar 2017 Resolved
Other · EPA contaminant 7500 began Dec 2016 Resolved
Other · EPA contaminant 7500 began Mar 2016 Resolved
Other · EPA contaminant 0700 began Mar 2016 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2016 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2015 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2015 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2015 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2015 Resolved
Other · EPA contaminant 7000 began Jul 2013 Addressed

Recent enforcement actions

  • State action · SOX Nov 2020
  • State action · SO6 Nov 2017
  • State action · SIF Sep 2017
  • State action · SIF Sep 2017
  • State action · SOX Sep 2017
  • State action · SOX Aug 2017
  • State action · SOX Aug 2017
  • State action · SFJ Jan 2017

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

0.0085 · max 0.012 mg/L · 6

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 MO4036059 — 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.