Community Water System · PWSID ID4200023

Hammett Haven Apartments

Serves 64 peopleGroundwaterOwner: PrivateMountain Home, Idaho
Nothing open right now.

On record since 1980: 41 violations. 9 over the limit · 2 treatment lapses · 25 missed or late tests · 5 notices or reports. 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.

9Over the limit
2Treatment lapse
25Missed or late test
5Notice or report

More violations on record than 93% of active water systems in Idaho. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

1980 · Missed or late test: 1198019851986 · Missed or late test: 21986 · Missed or late test: 21988 · Missed or late test: 11989 · Missed or late test: 21989 · Missed or late test: 219901993 · Missed or late test: 31993 · Missed or late test: 31993 · Missed or late test: 31994 · Missed or late test: 119951996 · Over the limit: 21996 · Over the limit: 21996 · Missed or late test: 21996 · Missed or late test: 21998 · Missed or late test: 21998 · Missed or late test: 21999 · Missed or late test: 21999 · Missed or late test: 22000 · Missed or late test: 22000 · Missed or late test: 220002003 · Missed or late test: 120052009 · Missed or late test: 120102013 · Over the limit: 12013 · Notice or report: 12014 · Over the limit: 12014 · Missed or late test: 12014 · Notice or report: 22014 · Notice or report: 22015 · Missed or late test: 22015 · Missed or late test: 220152016 · Missed or late test: 12017 · Treatment lapse: 120202023 · Missed or late test: 12024 · Over the limit: 22024 · Over the limit: 22024 · Treatment lapse: 12024 · Notice or report: 12025 · Over the limit: 32025 · Over the limit: 32025 · Over the limit: 32025 · Notice or report: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
22% over the limit · 95% treatment lapse · 261% missed or late test · 2512% notice or report · 5

Across Idaho, 80% of violations are missed or late tests and 5% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Arsenic2025-07-01 · Arsenic: measured 0.0180 MG/L vs limit 0.0100 MG/L (1.8×)2025-04-01 · Arsenic: measured 0.0180 MG/L vs limit 0.0100 MG/L (1.8×)2025-01-01 · Arsenic: measured 0.0180 MG/L vs limit 0.0100 MG/L (1.8×)2024-10-01 · Arsenic: measured 0.0180 MG/L vs limit 0.0100 MG/L (1.8×)2024-07-01 · Arsenic: measured 0.0190 MG/L vs limit 0.0100 MG/L (1.9×)
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

30 ppb
5 ppb
3 ppb
0 ppb
0 ppb

Every violation on record

  1. 2025-07-01ArsenicMCL, Averagemeasured 0.0180 MG/L · limit 0.0100 MG/LPeriod ended · no return to compliance on file
  2. 2025-04-01ArsenicMCL, Averagemeasured 0.0180 MG/L · limit 0.0100 MG/LPeriod ended · no return to compliance on file
  3. 2025-01-03Public NoticePN Violation for NPDWR ViolationBack in compliance
  4. 2025-01-01ArsenicMCL, Averagemeasured 0.0180 MG/L · limit 0.0100 MG/LPeriod ended · no return to compliance on file
  5. 2024-10-17Lead service line inventoryRPTBack in compliance
  6. 2024-10-17Lead service line inventoryTTBack in compliance
  7. 2024-10-01ArsenicMCL, Averagemeasured 0.0180 MG/L · limit 0.0100 MG/LPeriod ended · no return to compliance on file
  8. 2024-07-01ArsenicMCL, Averagemeasured 0.0190 MG/L · limit 0.0100 MG/LPeriod ended · no return to compliance on file
  9. 2023-11-01Revised Total Coliform RuleMONBack in compliance
  10. 2017-06-01Revised Total Coliform RuleTTSystem inactive
  11. 2016-12-30Lead and Copper RuleLead Consumer NoticeSystem inactive
  12. 2015-12-30Lead and Copper RuleLead Consumer NoticeSystem inactive
  13. 2015-05-01Coliform (TCR)Monitoring, Routine Major (TCR)System inactive
  14. 2014-09-08Groundwater RuleFailure to Consult with StateBack in compliance
  15. 2014-09-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  16. 2014-08-27E. ColiMonitoring, Source Water (GWR)Back in compliance
  17. 2014-07-01Coliform (TCR)MCL, Monthly (TCR)System inactive
  18. 2013-10-06Public NoticePN Violation for NPDWR ViolationBack in compliance
  19. 2013-08-01Coliform (TCR)MCL, Monthly (TCR)System inactive
  20. 2009-04-01Coliform (TCR)Monitoring, Routine Major (TCR)System inactive
  21. 2003-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  22. 2000-06-01Coliform (TCR)Monitoring, Routine Major (TCR)System inactive
  23. 2000-04-01Coliform (TCR)Monitoring, Routine Major (TCR)System inactive
  24. 1999-08-01Coliform (TCR)Monitoring, Routine Major (TCR)System inactive
  25. 1999-04-01Coliform (TCR)Monitoring, Routine Major (TCR)System inactive
Show the other 16 entries
  1. 1998-07-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  2. 1998-01-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  3. 1996-08-01Coliform (TCR)Monitoring, Routine Major (TCR)System inactive
  4. 1996-07-01Coliform (TCR)MCL, Monthly (TCR)System inactive
  5. 1996-07-01Coliform (TCR)MCL, Acute (TCR)System inactive
  6. 1996-01-01Coliform (TCR)Monitoring, Routine Major (TCR)System inactive
  7. 1994-01-01Coliform (TCR)Monitoring, Routine Major (TCR)System inactive
  8. 1993-07-01Coliform (TCR)Monitoring, Routine Major (TCR)System inactive
  9. 1993-04-01Coliform (TCR)Monitoring, Routine Major (TCR)System inactive
  10. 1993-01-01Coliform (TCR)Monitoring, Routine Major (TCR)System inactive
  11. 1989-07-01Coliform (Pre-TCR)Monitoring, RegularSystem inactive
  12. 1989-04-01Coliform (Pre-TCR)Monitoring, RegularSystem inactive
  13. 1988-07-01Coliform (Pre-TCR)Monitoring, RegularSystem inactive
  14. 1986-07-01Coliform (Pre-TCR)Monitoring, RegularSystem inactive
  15. 1986-03-01Coliform (Pre-TCR)Monitoring, RegularSystem inactive
  16. 1980-04-01Coliform (Pre-TCR)Monitoring, RegularSystem inactive

System details

Population served64
Service connections9
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityMountain Home
EPA ZIP on file83647

Areas served

  • Elmore County

Reading this record

Hammett Haven Apartments is a community water system that draws from groundwater and serves about 64 people in Mountain Home, Idaho. 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.