Non-Transient Non-Community · PWSID CT0309013

Columbia Manufacturing - Well #1

Serves 150 peopleGroundwaterOwner: PrivateColumbia, Connecticut

1 open treatment violation.

Open for: Lead service line inventory. 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 1994: 280 violations. 5 treatment lapses · 269 missed or late tests · 6 notices or reports. Most recent began 2024-11-01.

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

5Treatment lapse1 open

269Missed or late test

6Notice or report1 open

More violations on record than 99% 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

One square ≈ 5 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.

2% treatment lapse · 596% missed or late test · 2692% notice or report · 6

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

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 18 results on file · action level 15 ppb

80 ppb

14.4 ppb

14.1 ppb

11.1 ppb

9.3 ppb

6.6 ppb

6.1 ppb

5.7 ppb

5.2 ppb

4.8 ppb

4.7 ppb

4.1 ppb

3.7 ppb

3.4 ppb

2.7 ppb

2.4 ppb

2 ppb

1.9 ppb

Open now (2)

2024-10-17Lead service line inventoryRPTOpen
2024-10-17Lead service line inventoryTTOpen

Every violation on record

2024-11-01Revised Total Coliform RuleMONBack in compliance
2024-10-17Lead service line inventoryRPTOpen
2024-10-17Lead service line inventoryTTOpen
2024-08-03Revised Total Coliform RuleRPTBack in compliance
2024-03-31Lead and Copper RuleLead Consumer NoticeBack in compliance
2023-11-01Revised Total Coliform RuleMONBack in compliance
2023-08-01Revised Total Coliform RuleMONBack in compliance
2023-07-01Revised Total Coliform RuleMONBack in compliance
2023-04-01Lead and Copper RuleLead Consumer NoticeBack in compliance
2023-01-15Public NoticePN Violation for NPDWR ViolationBack in compliance
2023-01-15Revised Total Coliform RuleTTBack in compliance
2023-01-01Revised Total Coliform RuleMONBack in compliance
2022-10-01Revised Total Coliform RuleMONBack in compliance
2022-09-29Lead and Copper RuleLead Consumer NoticeBack in compliance
2022-04-01Lead and Copper RuleLead Consumer NoticeBack in compliance
2022-01-01NitriteMonitoring, RegularBack in compliance
2022-01-01NitrateMonitoring, RegularBack in compliance
2022-01-01n-PropylbenzeneMonitoring, RegularBack in compliance
2022-01-01o-XyleneMonitoring, RegularBack in compliance
2022-01-01StyreneMonitoring, RegularBack in compliance
2022-01-01m-XyleneMonitoring, RegularBack in compliance
2022-01-01BromobenzeneMonitoring, RegularBack in compliance
2022-01-01EthylbenzeneMonitoring, RegularBack in compliance
2022-01-01TolueneMonitoring, RegularBack in compliance
2022-01-01BenzeneMonitoring, RegularBack in compliance

Show the other 254 entries

2022-01-01ChlorobenzeneMonitoring, RegularBack in compliance
2022-01-011,1,2,2-TetrachloroethaneMonitoring, RegularBack in compliance
2022-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
2022-01-011,1,1,2-TetrachloroethaneMonitoring, RegularBack in compliance
2022-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
2022-01-01TrichloroethyleneMonitoring, RegularBack in compliance
2022-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
2022-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
2022-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
2022-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
2022-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
2022-01-011,1-DichloroethaneMonitoring, RegularBack in compliance
2022-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
2022-01-01Vinyl chlorideMonitoring, RegularBack in compliance
2022-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
2022-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
2022-01-01m-DichlorobenzeneMonitoring, RegularBack in compliance
2022-01-01p-ChlorotolueneMonitoring, RegularBack in compliance
2022-01-01o-ChlorotolueneMonitoring, RegularBack in compliance
2022-01-01DichloromethaneMonitoring, RegularBack in compliance
2022-01-01p-XyleneMonitoring, RegularBack in compliance
2022-01-01DibromochloromethaneMonitoring, RegularBack in compliance
2022-01-01BromodichloromethaneMonitoring, RegularBack in compliance
2022-01-01BromoformMonitoring, RegularBack in compliance
2022-01-01ChloroformMonitoring, RegularBack in compliance
2022-01-011,3,5-TrimethylbenzeneMonitoring, RegularBack in compliance
2022-01-01n-ButylbenzeneMonitoring, RegularBack in compliance
2022-01-011,2,4-TrimethylbenzeneMonitoring, RegularBack in compliance
2022-01-012,2-DichloropropaneMonitoring, RegularBack in compliance
2022-01-011,2,3-TrichloropropaneMonitoring, RegularBack in compliance
2022-01-011, 3-DichloropropeneMonitoring, RegularBack in compliance
2022-01-011,3-DichloropropaneMonitoring, RegularBack in compliance
2022-01-011,1-DichloropropeneMonitoring, RegularBack in compliance
2022-01-01DibromomethaneMonitoring, RegularBack in compliance
2022-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
2022-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
2022-01-01Methyl Tert-Butyl EtherMonitoring, RegularBack in compliance
2022-01-01NaphthaleneMonitoring, RegularBack in compliance
2022-01-01ChloroethaneMonitoring, RegularBack in compliance
2022-01-01BromomethaneMonitoring, RegularBack in compliance
2022-01-01ChloromethaneMonitoring, RegularBack in compliance
2021-09-29Lead and Copper RuleLead Consumer NoticeBack in compliance
2021-04-01Lead and Copper RuleLead Consumer NoticeBack in compliance
2021-01-01Revised Total Coliform RuleMONBack in compliance
2020-09-29Lead and Copper RuleLead Consumer NoticeBack in compliance
2020-03-31Lead and Copper RuleLead Consumer NoticeBack in compliance
2020-01-01n-PropylbenzeneMonitoring, RegularBack in compliance
2020-01-01o-XyleneMonitoring, RegularBack in compliance
2020-01-01StyreneMonitoring, RegularBack in compliance
2020-01-01m-XyleneMonitoring, RegularBack in compliance
2020-01-01BromobenzeneMonitoring, RegularBack in compliance
2020-01-01EthylbenzeneMonitoring, RegularBack in compliance
2020-01-01TolueneMonitoring, RegularBack in compliance
2020-01-01BenzeneMonitoring, RegularBack in compliance
2020-01-01ChlorobenzeneMonitoring, RegularBack in compliance
2020-01-011,1,2,2-TetrachloroethaneMonitoring, RegularBack in compliance
2020-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
2020-01-011,1,1,2-TetrachloroethaneMonitoring, RegularBack in compliance
2020-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
2020-01-01TrichloroethyleneMonitoring, RegularBack in compliance
2020-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
2020-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
2020-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
2020-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
2020-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
2020-01-011,1-DichloroethaneMonitoring, RegularBack in compliance
2020-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
2020-01-01Vinyl chlorideMonitoring, RegularBack in compliance
2020-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
2020-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
2020-01-01m-DichlorobenzeneMonitoring, RegularBack in compliance
2020-01-01p-ChlorotolueneMonitoring, RegularBack in compliance
2020-01-01o-ChlorotolueneMonitoring, RegularBack in compliance
2020-01-01DichloromethaneMonitoring, RegularBack in compliance
2020-01-01p-XyleneMonitoring, RegularBack in compliance
2020-01-01DibromochloromethaneMonitoring, RegularBack in compliance
2020-01-01BromodichloromethaneMonitoring, RegularBack in compliance
2020-01-01BromoformMonitoring, RegularBack in compliance
2020-01-01ChloroformMonitoring, RegularBack in compliance
2020-01-011,3,5-TrimethylbenzeneMonitoring, RegularBack in compliance
2020-01-01n-ButylbenzeneMonitoring, RegularBack in compliance
2020-01-011,2,4-TrimethylbenzeneMonitoring, RegularBack in compliance
2020-01-012,2-DichloropropaneMonitoring, RegularBack in compliance
2020-01-011,2,3-TrichloropropaneMonitoring, RegularBack in compliance
2020-01-011, 3-DichloropropeneMonitoring, RegularBack in compliance
2020-01-011,3-DichloropropaneMonitoring, RegularBack in compliance
2020-01-011,1-DichloropropeneMonitoring, RegularBack in compliance
2020-01-01DibromomethaneMonitoring, RegularBack in compliance
2020-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
2020-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
2020-01-01Methyl Tert-Butyl EtherMonitoring, RegularBack in compliance
2020-01-01NaphthaleneMonitoring, RegularBack in compliance
2020-01-01ChloroethaneMonitoring, RegularBack in compliance
2020-01-01BromomethaneMonitoring, RegularBack in compliance
2020-01-01ChloromethaneMonitoring, RegularBack in compliance
2020-01-01NitriteMonitoring, RegularBack in compliance
2020-01-01NitrateMonitoring, RegularBack in compliance
2019-09-29Lead and Copper RuleLead Consumer NoticeBack in compliance
2019-04-01Lead and Copper RuleLead Consumer NoticeBack in compliance
2018-09-29Lead and Copper RuleLead Consumer NoticeBack in compliance
2018-04-11Public NoticePN Violation for NPDWR ViolationBack in compliance
2018-01-01NitriteMonitoring, RegularBack in compliance
2018-01-01NitrateMonitoring, RegularBack in compliance
2018-01-01n-PropylbenzeneMonitoring, RegularBack in compliance
2018-01-01o-XyleneMonitoring, RegularBack in compliance
2018-01-01StyreneMonitoring, RegularBack in compliance
2018-01-01m-XyleneMonitoring, RegularBack in compliance
2018-01-01BromobenzeneMonitoring, RegularBack in compliance
2018-01-01EthylbenzeneMonitoring, RegularBack in compliance
2018-01-01TolueneMonitoring, RegularBack in compliance
2018-01-01BenzeneMonitoring, RegularBack in compliance
2018-01-01ChlorobenzeneMonitoring, RegularBack in compliance
2018-01-011,1,2,2-TetrachloroethaneMonitoring, RegularBack in compliance
2018-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
2018-01-011,1,1,2-TetrachloroethaneMonitoring, RegularBack in compliance
2018-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
2018-01-01TrichloroethyleneMonitoring, RegularBack in compliance
2018-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
2018-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
2018-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
2018-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
2018-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
2018-01-011,1-DichloroethaneMonitoring, RegularBack in compliance
2018-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
2018-01-01Vinyl chlorideMonitoring, RegularBack in compliance
2018-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
2018-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
2018-01-01m-DichlorobenzeneMonitoring, RegularBack in compliance
2018-01-01p-ChlorotolueneMonitoring, RegularBack in compliance
2018-01-01o-ChlorotolueneMonitoring, RegularBack in compliance
2018-01-01DichloromethaneMonitoring, RegularBack in compliance
2018-01-01p-XyleneMonitoring, RegularBack in compliance
2018-01-01DibromochloromethaneMonitoring, RegularBack in compliance
2018-01-01BromodichloromethaneMonitoring, RegularBack in compliance
2018-01-01BromoformMonitoring, RegularBack in compliance
2018-01-01ChloroformMonitoring, RegularBack in compliance
2018-01-011,3,5-TrimethylbenzeneMonitoring, RegularBack in compliance
2018-01-01n-ButylbenzeneMonitoring, RegularBack in compliance
2018-01-011,2,4-TrimethylbenzeneMonitoring, RegularBack in compliance
2018-01-012,2-DichloropropaneMonitoring, RegularBack in compliance
2018-01-011,2,3-TrichloropropaneMonitoring, RegularBack in compliance
2018-01-011, 3-DichloropropeneMonitoring, RegularBack in compliance
2018-01-011,3-DichloropropaneMonitoring, RegularBack in compliance
2018-01-011,1-DichloropropeneMonitoring, RegularBack in compliance
2018-01-01DibromomethaneMonitoring, RegularBack in compliance
2018-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
2018-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
2018-01-01Methyl Tert-Butyl EtherMonitoring, RegularBack in compliance
2018-01-01NaphthaleneMonitoring, RegularBack in compliance
2018-01-01ChloroethaneMonitoring, RegularBack in compliance
2018-01-01BromomethaneMonitoring, RegularBack in compliance
2018-01-01ChloromethaneMonitoring, RegularBack in compliance
2016-10-01Revised Total Coliform RuleMONBack in compliance
2016-01-01Lead and Copper RuleWater Quality Parameter M/RBack in compliance
2016-01-01n-PropylbenzeneMonitoring, RegularBack in compliance
2016-01-01o-XyleneMonitoring, RegularBack in compliance
2016-01-01StyreneMonitoring, RegularBack in compliance
2016-01-01m-XyleneMonitoring, RegularBack in compliance
2016-01-01BromobenzeneMonitoring, RegularBack in compliance
2016-01-01EthylbenzeneMonitoring, RegularBack in compliance
2016-01-01TolueneMonitoring, RegularBack in compliance
2016-01-01BenzeneMonitoring, RegularBack in compliance
2016-01-01ChlorobenzeneMonitoring, RegularBack in compliance
2016-01-011,1,2,2-TetrachloroethaneMonitoring, RegularBack in compliance
2016-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
2016-01-011,1,1,2-TetrachloroethaneMonitoring, RegularBack in compliance
2016-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
2016-01-01TrichloroethyleneMonitoring, RegularBack in compliance
2016-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
2016-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
2016-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
2016-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
2016-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
2016-01-011,1-DichloroethaneMonitoring, RegularBack in compliance
2016-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
2016-01-01Vinyl chlorideMonitoring, RegularBack in compliance
2016-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
2016-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
2016-01-01m-DichlorobenzeneMonitoring, RegularBack in compliance
2016-01-01p-ChlorotolueneMonitoring, RegularBack in compliance
2016-01-01o-ChlorotolueneMonitoring, RegularBack in compliance
2016-01-01DichloromethaneMonitoring, RegularBack in compliance
2016-01-01p-XyleneMonitoring, RegularBack in compliance
2016-01-01DibromochloromethaneMonitoring, RegularBack in compliance
2016-01-01BromodichloromethaneMonitoring, RegularBack in compliance
2016-01-01BromoformMonitoring, RegularBack in compliance
2016-01-01ChloroformMonitoring, RegularBack in compliance
2016-01-011,3,5-TrimethylbenzeneMonitoring, RegularBack in compliance
2016-01-01n-ButylbenzeneMonitoring, RegularBack in compliance
2016-01-011,2,4-TrimethylbenzeneMonitoring, RegularBack in compliance
2016-01-012,2-DichloropropaneMonitoring, RegularBack in compliance
2016-01-011,2,3-TrichloropropaneMonitoring, RegularBack in compliance
2016-01-011, 3-DichloropropeneMonitoring, RegularBack in compliance
2016-01-011,3-DichloropropaneMonitoring, RegularBack in compliance
2016-01-011,1-DichloropropeneMonitoring, RegularBack in compliance
2016-01-01DibromomethaneMonitoring, RegularBack in compliance
2016-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
2016-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
2016-01-01Methyl Tert-Butyl EtherMonitoring, RegularBack in compliance
2016-01-01NaphthaleneMonitoring, RegularBack in compliance
2016-01-01ChloroethaneMonitoring, RegularBack in compliance
2016-01-01BromomethaneMonitoring, RegularBack in compliance
2016-01-01ChloromethaneMonitoring, RegularBack in compliance
2015-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
2014-10-11Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
2014-04-01Lead and Copper RuleOCCT/SOWT Study/RecommendationBack in compliance
2014-04-01Lead and Copper RuleInitial, Follow-up, or Routine Source Water M/RBack in compliance
2014-01-01ChlordaneMonitoring, RegularBack in compliance
2014-01-01Ethylene DibromideMonitoring, RegularBack in compliance
2014-01-011, 2-Dibromo-3-ChloropropaneMonitoring, RegularBack in compliance
2014-01-01MetribuzinMonitoring, RegularBack in compliance
2014-01-01DicambaMonitoring, RegularBack in compliance
2014-01-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularBack in compliance
2014-01-01AldrinMonitoring, RegularBack in compliance
2014-01-01PentachlorophenolMonitoring, RegularBack in compliance
2014-01-012, 4, 5-TpMonitoring, RegularBack in compliance
2014-01-012, 4-DMonitoring, RegularBack in compliance
2014-01-01PropachlorMonitoring, RegularBack in compliance
2014-01-01ButachlorMonitoring, RegularBack in compliance
2014-01-01DieldrinMonitoring, RegularBack in compliance
2014-01-01Heptachlor epoxideMonitoring, RegularBack in compliance
2014-01-013-HydroxycarbofuranMonitoring, RegularBack in compliance
2014-01-01HeptachlorMonitoring, RegularBack in compliance
2014-01-01LassoMonitoring, RegularBack in compliance
2014-01-01AtrazineMonitoring, RegularBack in compliance
2014-01-01AldicarbMonitoring, RegularBack in compliance
2014-01-01CarbofuranMonitoring, RegularBack in compliance
2014-01-01MetolachlorMonitoring, RegularBack in compliance
2014-01-01Aldicarb sulfoneMonitoring, RegularBack in compliance
2014-01-01Aldicarb sulfoxideMonitoring, RegularBack in compliance
2014-01-01MethomylMonitoring, RegularBack in compliance
2014-01-01CarbarylMonitoring, RegularBack in compliance
2014-01-01ToxapheneMonitoring, RegularBack in compliance
2014-01-01MethoxychlorMonitoring, RegularBack in compliance
2014-01-01Bhc-GammaMonitoring, RegularBack in compliance
2014-01-01Benzo(a)pyreneMonitoring, RegularBack in compliance
2014-01-01HexachlorobenzeneMonitoring, RegularBack in compliance
2014-01-01HexachlorocyclopentadieneMonitoring, RegularBack in compliance
2014-01-01DinosebMonitoring, RegularBack in compliance
2014-01-01PicloramMonitoring, RegularBack in compliance
2014-01-01Di(2-ethylhexyl) phthalateMonitoring, RegularBack in compliance
2014-01-01SimazineMonitoring, RegularBack in compliance
2014-01-01OxamylMonitoring, RegularBack in compliance
2014-01-01Di(2-ethylhexyl) adipateMonitoring, RegularBack in compliance
2014-01-01GlyphosateMonitoring, RegularBack in compliance
2014-01-01DiquatMonitoring, RegularBack in compliance
2014-01-01DalaponMonitoring, RegularBack in compliance
2014-01-01EndrinMonitoring, RegularBack in compliance
2013-12-01Lead and Copper RulePublic EducationBack in compliance
2001-07-01Lead and Copper RuleOCCT/SOWT Study/RecommendationBack in compliance
2001-01-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
2000-01-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
1999-07-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
1994-07-01Lead and Copper RuleInitial, Follow-up, or Routine Source Water M/RBack in compliance

System details

Population served	150
Service connections	1
Water source	Groundwater
System type	Non-Transient Non-Community
Owner	Private
Status	Active
City	Columbia
EPA ZIP on file	06237

Areas served

Columbia, Tolland County

Reading this record

Columbia Manufacturing - Well #1 is a non-transient non-community that draws from groundwater and serves about 150 people in Columbia, 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.