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Public water system record

Lagrange PWS

Serves La Grange, Lewis County, MO · 874 people served

Federal records show 4 health-based violations and 3 monitoring/reporting issues for Lagrange PWS in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • MO2010440
  • LAGRANGE
  • MO
  • 874 served

System profile

Source water Groundwater
ZIP 63448
EPA system ID MO2010440

Verify this system on EPA ECHO →

Health-based violations, last 10 years
4
Resolved
4
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
3

Key facts

  • Lagrange PWS draws water from 3 wells (1 of them for emergency, seasonal or other part-time use).
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 89 µg/L, federal limit 80 µg/L (1.1 times the limit), 2017.
  • Record on file since 2003, with 2 health-based violations before October 19, 2016.
  • Lead pipe inventory: 3 lead and 20 unknown out of 384 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 83 µg/L, federal limit 80 µg/L (at or just above the limit)
 220 Jan 1, 2025 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 84 µg/L, federal limit 80 µg/L (1.1 times the limit)
 220 Apr 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 89 µg/L, federal limit 80 µg/L (1.1 times the limit)
 220 Jan 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 89 µg/L, federal limit 80 µg/L (1.1 times the limit)
 220 Oct 1, 2016 Resolved No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Public Notice
OTHER
 Jul 3, 2025 Resolved
Groundwater Rule
Monitoring and reporting
 Jan 1, 2025 Resolved
Revised Total Coliform Rule
Monitoring violation
 Mar 1, 2017 Resolved

Full record since 2003

EPA's records for Lagrange PWS go back to 2003. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 9 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 0 4
2010 to October 18, 2016 2 5
October 19, 2016 to 2019 2 1
2020s 1 2

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began October 2016, Resolved.

Show all 2 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 89 µg/L, federal limit 80 µg/L (1.1 times the limit)
 Oct 1, 2016 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 86 µg/L, federal limit 80 µg/L (1.1 times the limit)
 Jul 1, 2016 Resolved

What the violations mean

Total Trihalomethanes (TTHMs)

4 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Lagrange PWS draws water from 3 wells (1 of them for emergency, seasonal or other part-time use).

Annual water quality report

Lagrange PWS must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Missouri.

Certified drinking water labs by state EPA guidance for private wells