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Water system · PWSID MN1820009

Lake Elmo

Lake Elmo, MN · ~10,978 people served

Check your exact address → Lake Elmo overview
67
Fair
PurityRadar safety score

PWSID

MN1820009

State

Minnesota

City

Lake Elmo

Population served

10,978

Primary source

Groundwater

Score history

▼ 33 points — the score moved from 100 to 67 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 67

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 Aug 2023). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

12 ppt

limit 4 ppt

Above EPA limit · 3.0×

PFBA

100 ppt

limit —

No federal limit

PFPeA

3 ppt

limit —

No federal limit

Violations & enforcement

6

Violations on record

0

Unaddressed

6

Health-based

42

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2015. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Nov 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2010 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 1999 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 1993 Resolved

Recent enforcement actions

  • State action · SIF Dec 2015
  • State action · SOX Dec 2015
  • State action · SFJ Nov 2015
  • State action · SIB Nov 2015
  • State action · SIE Nov 2015
  • State action · SIC Nov 2015
  • State action · SFJ Nov 2015
  • State action · SOX Nov 2011

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

2 stations · latest Oct 2025

5.1 · max 39.2 ug/L · 76

Lead

2 stations · latest Aug 2025

1.7 · max 18.5 ug/L · 51

Nitrate

2 stations · latest Sep 2024

0.2 · max 0.45 mg/L · 48

Manganese

1 station · latest Aug 2022

13 · max 13 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 MN1820009 — 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.