Non-Transient Non-Community · PWSID AK2331011

Prudhoe Bay Opt. Center

Serves 1,200 peopleSurface WaterOwner: PrivateAnchorage, Alaska
Nothing open right now.

On record since 2015: 12 violations. 1 over the limit · 1 treatment lapse · 10 missed or late tests. Most recent began 2025-06-01.

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

1Over the limit
1Treatment lapse
10Missed or late test
0Notice or report

More violations on record than 60% of active water systems in Alaska. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

200520102015 · Missed or late test: 120152016 · Missed or late test: 22016 · Missed or late test: 22020 · Missed or late test: 42020 · Missed or late test: 42020 · Missed or late test: 42020 · Missed or late test: 420202021 · Over the limit: 12022 · Missed or late test: 12023 · Missed or late test: 22023 · Missed or late test: 22025 · Treatment lapse: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
8% over the limit · 18% treatment lapse · 183% missed or late test · 10

Across Alaska, 88% of violations are missed or late tests and 2% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)2021-01-01 · Trihalomethanes (TTHM): measured 0.1040 MG/L vs limit 0.0800 MG/L (1.3×)
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 5 results on file · action level 15 ppb

1.2 ppb
1.1 ppb
0 ppb
0 ppb
0 ppb

Every violation on record

  1. 2025-06-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  2. 2023-07-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  3. 2023-07-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  4. 2022-04-01Carbon, TotalMonitoring and Reporting (DBP)Back in compliance
  5. 2021-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1040 MG/L · limit 0.0800 MG/LBack in compliance
  6. 2020-12-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  7. 2020-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  8. 2020-06-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  9. 2020-06-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  10. 2016-09-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  11. 2016-09-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  12. 2015-03-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance

System details

Population served1,200
Service connections5
Water sourceSurface Water
System typeNon-Transient Non-Community
OwnerPrivate
StatusActive
CityAnchorage
EPA ZIP on file99503

Areas served

  • Prudhoe Bay, North Slope Borough

Reading this record

Prudhoe Bay Opt. Center is a non-transient non-community that draws from surface water and serves about 1,200 people in Anchorage, Alaska. 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.