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Public water system record

Coffey PWS

Serves an area of Daviess County, MO that includes Coffey · 166 people served

Federal records show 4 health-based violations and 1 monitoring/reporting issue for Coffey PWS in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • MO1010179
  • COFFEY
  • MO
  • 166 served

System profile

Source water Purchased groundwater
ZIP 64636
EPA system ID MO1010179

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
1

Key facts

  • Coffey PWS buys its water from Harrison County PWSD 2.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 132 µg/L, federal limit 80 µg/L (1.7 times the limit), 2017.
  • Most recent enforcement action: boil water order by Missouri, September 1988.
  • Record on file since 1994, with 5 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 42 unknown out of 92 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 97 µg/L, federal limit 80 µg/L (1.2 times the limit)
 220 Jul 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 102 µg/L, federal limit 80 µg/L (1.3 times the limit)
 220 Apr 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 132 µg/L, federal limit 80 µg/L (1.7 times the limit)
 220 Jan 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 129 µg/L, federal limit 80 µg/L (1.6 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
Lead and Copper Rule
Monitoring and reporting
 Oct 1, 2024 Resolved

Full record since 1994

EPA's records for Coffey PWS go back to 1994. Before October 19, 2016 they list 5 health-based violations (4 resolved, 1 archived by EPA without a recorded fix) and 38 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 1 35
2000s 0 1
2010 to October 18, 2016 4 2
October 19, 2016 to 2019 3 0
2020s 0 1

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

Show all 5 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 129 µg/L, federal limit 80 µg/L (1.6 times the limit)
 Oct 1, 2016 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 112 µg/L, federal limit 80 µg/L (1.4 times the limit)
 Jul 1, 2016 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 149 µg/L, federal limit 80 µg/L (1.9 times the limit)
 Apr 1, 2016 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 103 µg/L, federal limit 80 µg/L (1.3 times the limit)
 Jan 1, 2016 Resolved
Total Coliform
Contaminant limit exceeded
 Mar 1, 1997 Archived

Enforcement actions

Missouri regulators issued 1 boil water order to Coffey PWS in 1988, filed as 2 records in EPA's data. The most recent was a boil water order in September 1988.

Date By Action Violations covered
Sep 30, 1988 Missouri Boil water order 2 violations

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

Coffey PWS buys its water from Harrison County PWSD 2. It lists no wells or intakes of its own.

Buys water from

Annual water quality report

Coffey 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.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Coffey PWS for a copy.

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