Community Water System · PWSID ME0091510

Stonington Water Company

Serves 683 peopleGroundwaterOwner: Local GovernmentWinterport, Maine
Nothing open right now.

On record since 2018: 11 violations. 5 over the limit · 6 missed or late tests. Most recent began 2023-07-01.

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

5Over the limit
0Treatment lapse
6Missed or late test
0Notice or report

More violations on record than 72% of active water systems in Maine. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2005201020152018 · Over the limit: 12019 · Over the limit: 12019 · Missed or late test: 42019 · Missed or late test: 42019 · Missed or late test: 42019 · Missed or late test: 42020 · Over the limit: 120202021 · Over the limit: 12023 · Over the limit: 12023 · Missed or late test: 22023 · Missed or late test: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
45% over the limit · 555% missed or late test · 6

Across Maine, 59% of violations are missed or late tests and 3% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)Gross Alpha, Excl. Radon and U2023-07-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)2021-07-01 · Gross Alpha, Excl. Radon and U: measured 27.00 PCI/L vs limit 15.00 PCI/L (1.8×)2019-01-01 · Gross Alpha, Excl. Radon and U: measured 29.00 PCI/L vs limit 15.00 PCI/L (1.9×)2018-10-01 · Gross Alpha, Excl. Radon and U: measured 25.00 PCI/L vs limit 15.00 PCI/L (1.7×)
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 8 results on file · action level 15 ppb

3.1 ppb
2.5 ppb
2.2 ppb
2 ppb
1.9 ppb
1.6 ppb
1.4 ppb
1.3 ppb

Every violation on record

  1. 2023-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2023-04-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  3. 2023-04-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  4. 2021-07-01Gross Alpha, Excl. Radon and UMCL, Averagemeasured 27.00 PCI/L · limit 15.00 PCI/LBack in compliance
  5. 2020-12-01Revised Total Coliform RuleMCLBack in compliance
  6. 2019-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  7. 2019-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  8. 2019-01-01Gross Alpha, Excl. Radon and UMCL, Averagemeasured 29.00 PCI/L · limit 15.00 PCI/LBack in compliance
  9. 2019-01-01Combined Radium (-226 and -228)Monitoring, RegularBack in compliance
  10. 2019-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  11. 2018-10-01Gross Alpha, Excl. Radon and UMCL, Averagemeasured 25.00 PCI/L · limit 15.00 PCI/LBack in compliance

System details

Population served683
Service connections273
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityWinterport
EPA ZIP on file04496

Areas served

  • Stonington, Hancock County

Reading this record

Stonington Water Company is a community water system that draws from groundwater and serves about 683 people in Winterport, Maine. 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.