Community Water System · PWSID CT1040011

Norwich Public Utilities

Serves 36,163 peopleSurface WaterOwner: Local GovernmentNorwich, Connecticut
Nothing open right now.

On record since 2006: 16 violations. 9 over the limit · 7 notices or reports. Most recent began 2020-07-01.

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

9Over the limit
0Treatment lapse
0Missed or late test
7Notice or report

More violations on record than 79% of active water systems in Connecticut. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

20052006 · Notice or report: 12007 · Notice or report: 120102015 · Notice or report: 120152016 · Over the limit: 32016 · Over the limit: 32016 · Over the limit: 32016 · Notice or report: 12017 · Over the limit: 22017 · Over the limit: 22017 · Notice or report: 22017 · Notice or report: 22018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42020 · Notice or report: 120202025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
56% over the limit · 944% notice or report · 7

Across Connecticut, 76% of violations are missed or late tests and 1% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)Total Haloacetic Acids (HAA5)2018-07-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)2018-04-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2018-01-01 · Trihalomethanes (TTHM): measured 0.0890 MG/L vs limit 0.0800 MG/L (1.1×)2018-01-01 · Total Haloacetic Acids (HAA5): measured 0.0620 MG/L vs limit 0.0600 MG/L (1.0×)2017-10-01 · Trihalomethanes (TTHM): measured 0.0820 MG/L vs limit 0.0800 MG/L (1.0×)2017-07-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2016-07-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)2016-04-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)2016-01-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)
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 19 results on file · action level 15 ppb

4.8 ppb
2.4 ppb
2.3 ppb
1.5 ppb
1.5 ppb
1.1 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb

Every violation on record

  1. 2020-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  2. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LBack in compliance
  3. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LBack in compliance
  4. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0890 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  5. 2018-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0620 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  6. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LBack in compliance
  7. 2017-08-10Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  8. 2017-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  9. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LBack in compliance
  10. 2016-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  11. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LBack in compliance
  12. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LBack in compliance
  13. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LBack in compliance
  14. 2015-09-27Public NoticePN Violation for NPDWR ViolationBack in compliance
  15. 2007-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  16. 2006-02-15Public NoticePN Violation for NPDWR ViolationBack in compliance

System details

Population served36,163
Service connections12,846
Water sourceSurface Water
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityNorwich
EPA ZIP on file06360

Areas served

  • New London County

Reading this record

Norwich Public Utilities is a community water system that draws from surface water and serves about 36,163 people in Norwich, Connecticut. 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.