Transient Non-Community · PWSID MT0004841

T and T Subdivision

Serves 531 peopleGroundwaterOwner: PrivateWolf Creek, Montana
1 open treatment violation.

Open for: Revised Total Coliform Rule. EPA counts treatment-technique violations as health-based: a required protective step was not done. It is not a measurement of contamination.

On record since 2016: 13 violations. 2 treatment lapses · 11 missed or late tests. Most recent began 2025-10-07.

None of them is a measurement of contaminated water.

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

0Over the limit
2Treatment lapse1 open
11Missed or late test
0Notice or report

More violations on record than 78% of active water systems in Montana. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2005201020152016 · Missed or late test: 12018 · Missed or late test: 12019 · Treatment lapse: 12019 · Missed or late test: 22019 · Missed or late test: 220202021 · Missed or late test: 12023 · Missed or late test: 12024 · Missed or late test: 42024 · Missed or late test: 42024 · Missed or late test: 42024 · Missed or late test: 42025 · Treatment lapse: 12025 · Missed or late test: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
15% treatment lapse · 285% missed or late test · 11

Across Montana, 85% of violations are missed or late tests and 3% are water over a limit.

What you can do

  • Total Coliform Bacteria: If your water system has coliform violations, consider boiling water or using bottled water until the system confirms the issue is resolved. Contact your water provider for their latest test results and any boil-water advisories.

Open now (1)

  1. 2025-10-07Revised Total Coliform RuleTTOpen

Every violation on record

  1. 2025-10-07Revised Total Coliform RuleTTOpen
  2. 2025-08-26E. ColiMonitoring, Source Water (GWR)Back in compliance
  3. 2024-09-01Revised Total Coliform RuleMONBack in compliance
  4. 2024-06-01Revised Total Coliform RuleMONBack in compliance
  5. 2024-04-01Revised Total Coliform RuleMONBack in compliance
  6. 2024-03-01Revised Total Coliform RuleMONBack in compliance
  7. 2023-06-01Revised Total Coliform RuleMONBack in compliance
  8. 2021-10-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  9. 2019-02-26Revised Total Coliform RuleTTBack in compliance
  10. 2019-02-01Revised Total Coliform RuleMONBack in compliance
  11. 2019-01-15E. ColiMonitoring, Source Water (GWR)Back in compliance
  12. 2018-12-01Revised Total Coliform RuleMONBack in compliance
  13. 2016-02-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance

System details

Population served531
Service connections14
Water sourceGroundwater
System typeTransient Non-Community
OwnerPrivate
StatusActive
CityWolf Creek
EPA ZIP on file59648

Areas served

  • Wolf Creek, Lewis and Clark County

Reading this record

T and T Subdivision is a transient non-community that draws from groundwater and serves about 531 people in Wolf Creek, Montana. 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.