Community Water System · PWSID WY5600028

Kemmerer-Diamondville Jpb

Serves 3,348 peopleSurface WaterOwner: Local GovernmentKemmerer, Wyoming
Nothing open right now.

On record since 2000: 13 violations. 12 over the limit · 1 missed or late test. Most recent began 2025-07-01.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

12Over the limit
0Treatment lapse
1Missed or late test
0Notice or report

More violations on record than 83% of active water systems in Wyoming. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2000 · Missed or late test: 12000200520102015 · Over the limit: 22015 · Over the limit: 2201520202024 · Over the limit: 82024 · Over the limit: 82024 · Over the limit: 82024 · Over the limit: 82024 · Over the limit: 82024 · Over the limit: 82024 · Over the limit: 82024 · Over the limit: 82025 · Over the limit: 22025 · Over the limit: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
92% over the limit · 128% missed or late test · 1

Across Wyoming, 85% of violations are missed or late tests and 4% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)Total Haloacetic Acids (HAA5)2025-07-01 · Trihalomethanes (TTHM): measured 0.0820 MG/L vs limit 0.0800 MG/L (1.0×)2025-01-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2024-10-01 · Trihalomethanes (TTHM): measured 0.0890 MG/L vs limit 0.0800 MG/L (1.1×)2024-07-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2024-07-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2024-04-01 · Trihalomethanes (TTHM): measured 0.0920 MG/L vs limit 0.0800 MG/L (1.1×)2024-04-01 · Trihalomethanes (TTHM): measured 0.0850 MG/L vs limit 0.0800 MG/L (1.1×)2024-04-01 · Total Haloacetic Acids (HAA5): measured 0.0640 MG/L vs limit 0.0600 MG/L (1.1×)2024-01-01 · Trihalomethanes (TTHM): measured 0.0940 MG/L vs limit 0.0800 MG/L (1.2×)2024-01-01 · Total Haloacetic Acids (HAA5): measured 0.0640 MG/L vs limit 0.0600 MG/L (1.1×)2015-10-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)2015-07-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)
Each dot is one over-the-limit violation: the measured value divided by the limit it broke, on a log scale. Most legal limits for chemicals are running averages set for a lifetime of drinking, so “just over” and “ten times over” are very different news. Hover a dot for the numbers.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 3 results on file · action level 15 ppb

2 ppb
2 ppb
1 ppb

Every violation on record

  1. 2025-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2025-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  3. 2024-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0890 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  4. 2024-07-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  5. 2024-04-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0920 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2024-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0640 MG/L · limit 0.0600 MG/LBack in compliance
  7. 2024-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0940 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2024-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0640 MG/L · limit 0.0600 MG/LBack in compliance
  9. 2015-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LBack in compliance
  10. 2015-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LBack in compliance
  11. 2000-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance

System details

Population served3,348
Service connections1,440
Water sourceSurface Water
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityKemmerer
EPA ZIP on file83101

Areas served

  • Kemmerer, Lincoln County

Reading this record

Kemmerer-Diamondville Jpb is a community water system that draws from surface water and serves about 3,348 people in Kemmerer, Wyoming. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.