Tap Truth EPA drinking water records, in plain English

Public water system record

Kemmerer-Diamondville JPB

Serves Kemmerer and Diamondville, Lincoln County, WY · 3,348 people served

Federal records show 10 health-based violations and no monitoring/reporting issues for Kemmerer-Diamondville JPB in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • WY5600028
  • KEMMERER
  • WY
  • 3,348 served

System profile

Source water Surface water
ZIP 83101
EPA system ID WY5600028

Verify this system on EPA ECHO →

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

Key facts

  • Kemmerer-Diamondville JPB draws water from 1 surface water intake.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.094 mg/L, federal limit 0.08 mg/L (1.2 times the limit), 2024.
  • Most recent formal enforcement: compliance order (no penalty) by EPA, January 2025.
  • Record on file since 1979, with 11 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 1,582 unknown out of 1,687 service lines.

Check whether Kemmerer-Diamondville JPB serves your address

Address suggestions by Mapbox

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 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Jul 1, 2025 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jan 1, 2025 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Oct 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jul 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jul 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Apr 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Apr 1, 2024 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Apr 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.094 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Jan 1, 2024 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Jan 1, 2024 Resolved No

Full record since 1979

EPA's records for Kemmerer-Diamondville JPB go back to 1979. Before October 19, 2016 they list 11 health-based violations (6 resolved, 5 archived by EPA without a recorded fix) and 7 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1970s 1 0
1990s 4 5
2000s 4 1
2010 to October 18, 2016 2 1
2020s 10 0

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began October 2015, Resolved.

Show all 11 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 Oct 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Jul 1, 2015 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 Mar 1, 2007 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 Mar 1, 2007 Resolved
Surface Water Treatment Rule
Treatment technique failure
 Sep 1, 2005 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
 Jul 1, 2005 Resolved
Total Coliform
Contaminant limit exceeded
 Aug 1, 1997 Archived
Total Coliform
Contaminant limit exceeded
 Jun 1, 1996 Archived
Surface Water Treatment Rule
Treatment technique failure
 Nov 1, 1993 Archived
Surface Water Treatment Rule
Treatment technique failure
 Jul 1, 1993 Archived
Mercury
Contaminant limit exceeded
 Oct 20, 1979 Archived

Enforcement actions

EPA took 2 formal enforcement actions against Kemmerer-Diamondville JPB between 2016 and 2025, filed as 3 records in EPA's data. The most recent was a compliance order (no penalty) in January 2025.

Date By Action Violations covered
Jan 7, 2025 EPA Compliance order (no penalty) 10 violations (10 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
Mar 10, 2016 EPA Compliance order (no penalty) 6 violations (4 health-based): Chlorine, Total Trihalomethanes (TTHMs)

What the violations mean

Total Trihalomethanes (TTHMs)

8 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Haloacetic Acids (HAA5)

2 incidents

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

Where the water comes from

Kemmerer-Diamondville JPB draws water from 1 surface water intake. 1 other community water system buys water from Kemmerer-Diamondville JPB.

Community systems that buy water from it

Annual water quality report

Kemmerer-Diamondville JPB 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 EPA Region 8.

Certified drinking water labs by state EPA guidance for private wells