Non-Transient Non-Community · PWSID NH0268140

12 Tallwood

Serves 70 peopleGroundwaterOwner: PrivateLondonderry, New Hampshire
Nothing open right now.

On record since 2019: 13 violations. 3 over the limit · 3 missed or late tests · 7 notices or reports. Most recent began 2025-04-01.

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

3Over the limit
0Treatment lapse
3Missed or late test
7Notice or report

More violations on record than 89% of active water systems in New Hampshire. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2005201020152019 · Missed or late test: 12019 · Notice or report: 120202023 · Missed or late test: 12023 · Notice or report: 32023 · Notice or report: 32023 · Notice or report: 32024 · Over the limit: 12024 · Missed or late test: 12024 · Notice or report: 32024 · Notice or report: 32024 · Notice or report: 32025 · 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.
23% over the limit · 323% missed or late test · 354% notice or report · 7

Across New Hampshire, 37% of violations are missed or late tests and 7% are water over a limit.

Every violation on record

  1. 2025-04-01ArsenicMCL, Averagemeasured 0.0730 MG/LPeriod ended · no return to compliance on file
  2. 2025-01-01ArsenicMCL, Averagemeasured 0.0840 MG/LPeriod ended · no return to compliance on file
  3. 2024-09-22Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  4. 2024-08-12Revised Total Coliform RuleRPTBack in compliance
  5. 2024-07-01ArsenicMCL, Averagemeasured 0.0670 MG/LPeriod ended · no return to compliance on file
  6. 2024-07-01Revised Total Coliform RuleMONBack in compliance
  7. 2023-06-19Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  8. 2023-05-09Revised Total Coliform RuleRPTBack in compliance
  9. 2023-04-01Revised Total Coliform RuleMONBack in compliance
  10. 2019-01-01Revised Total Coliform RuleRPTBack in compliance
  11. 2019-01-01Revised Total Coliform RuleMONBack in compliance

System details

Population served70
Service connections1
Water sourceGroundwater
System typeNon-Transient Non-Community
OwnerPrivate
StatusActive
CityLondonderry
EPA ZIP on file03053

Areas served

  • Bow, Merrimack County

Reading this record

12 Tallwood is a non-transient non-community that draws from groundwater and serves about 70 people in Londonderry, New Hampshire. 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.