Community Water System · PWSID NH0613060

Centennial Estates

Serves 140 peopleGroundwaterOwner: PrivateDerry, New Hampshire
Nothing open right now.

On record since 2005: 8 violations. 1 over the limit · 1 missed or late test · 6 notices or reports. 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.

1Over the limit
0Treatment lapse
1Missed or late test
6Notice or report

More violations on record than 78% 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

2005 · Notice or report: 120052007 · Notice or report: 120102012 · Missed or late test: 12012 · Notice or report: 42012 · Notice or report: 42012 · Notice or report: 42012 · Notice or report: 4201520202023 · Over the limit: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
13% over the limit · 113% missed or late test · 175% notice or report · 6

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

Every violation on record

  1. 2023-07-01NitrateMCL, Single Samplemeasured 11.60 MG/LPeriod ended · no return to compliance on file
  2. 2012-10-29Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  3. 2012-08-03E. ColiMonitoring, Source Water (GWR)Back in compliance
  4. 2012-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  5. 2012-06-18Public NoticePN Violation for NPDWR ViolationBack in compliance
  6. 2007-01-31Public NoticePN Violation for NPDWR ViolationBack in compliance
  7. 2005-07-04Public NoticePN Violation for NPDWR ViolationBack in compliance

System details

Population served140
Service connections56
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityDerry
EPA ZIP on file03038

Areas served

  • Derry, Rockingham County

Reading this record

Centennial Estates is a community water system that draws from groundwater and serves about 140 people in Derry, 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.