Community Water System · PWSID LA1015044

Sligo Water System Incorporated

Serves 2,850 peopleGroundwaterOwner: PrivateCoushatta, Louisiana
1 open treatment violation.

Open for: Groundwater Rule. 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 2006: 56 violations. 3 over the limit · 8 treatment lapses · 16 missed or late tests · 29 notices or reports. Most recent began 2024-05-21.

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

3Over the limit
8Treatment lapse1 open
16Missed or late test
29Notice or report

More violations on record than 94% of active water systems in Louisiana. 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: 12008 · Missed or late test: 22008 · Missed or late test: 22008 · Notice or report: 120102011 · Treatment lapse: 22011 · Treatment lapse: 22011 · Missed or late test: 12011 · Notice or report: 12012 · Missed or late test: 12012 · Notice or report: 22012 · Notice or report: 22015 · Treatment lapse: 12015 · Missed or late test: 22015 · Missed or late test: 22015 · Notice or report: 22015 · Notice or report: 220152016 · Notice or report: 42016 · Notice or report: 42016 · Notice or report: 42016 · Notice or report: 42017 · Missed or late test: 12017 · Notice or report: 32017 · Notice or report: 32017 · Notice or report: 32018 · Over the limit: 32018 · Over the limit: 32018 · Over the limit: 32018 · Treatment lapse: 22018 · Treatment lapse: 22018 · Missed or late test: 12018 · Notice or report: 42018 · Notice or report: 42018 · Notice or report: 42018 · Notice or report: 42019 · Missed or late test: 42019 · Missed or late test: 42019 · Missed or late test: 42019 · Missed or late test: 42019 · Notice or report: 32019 · Notice or report: 32019 · Notice or report: 32020 · Treatment lapse: 12020 · Missed or late test: 12020 · Notice or report: 32020 · Notice or report: 32020 · Notice or report: 320202021 · Treatment lapse: 22021 · Treatment lapse: 22021 · Missed or late test: 12021 · Notice or report: 22021 · Notice or report: 22022 · Missed or late test: 12023 · Missed or late test: 12023 · Notice or report: 22023 · Notice or report: 22024 · Notice or report: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
5% over the limit · 314% treatment lapse · 829% missed or late test · 1652% notice or report · 29

Across Louisiana, 31% of violations are missed or late tests and 25% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Arsenic2018-10-01 · Arsenic: measured 0.0290 MG/L vs limit 0.0100 MG/L (2.9×)2018-07-01 · Arsenic: measured 0.0380 MG/L vs limit 0.0100 MG/L (3.8×)2018-01-01 · Arsenic: measured 0.0560 MG/L vs limit 0.0100 MG/L (5.6×)
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 9 results on file · action level 15 ppb

12 ppb
9 ppb
6 ppb
3 ppb
1 ppb
1 ppb
0 ppb
0 ppb
0 ppb

Copper, 90th percentile 3 results on file · action level 1.3 mg/L

1.9 mg/L
1.8 mg/L
1.4 mg/L

Open now (1)

  1. 2021-06-02Groundwater RuleFailure To Address DeficiencyOpen

Every violation on record

  1. 2024-05-21Public NoticePN Violation for NPDWR ViolationBack in compliance
  2. 2023-07-01Lead and Copper RuleWater Quality Parameter M/RPeriod ended · no return to compliance on file
  3. 2023-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  4. 2023-05-06Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 2022-07-01Lead and Copper RuleWater Quality Parameter M/RPeriod ended · no return to compliance on file
  6. 2021-07-10Public NoticePN Violation for NPDWR ViolationBack in compliance
  7. 2021-06-02Groundwater RuleFailure To Address DeficiencyOpen
  8. 2021-06-02Groundwater RuleFailure To Address DeficiencyBack in compliance
  9. 2021-05-08Public NoticePN Violation for NPDWR ViolationBack in compliance
  10. 2021-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  11. 2020-11-02Public NoticePN Violation for NPDWR ViolationBack in compliance
  12. 2020-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  13. 2020-06-15Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  14. 2020-01-11Lead and Copper RuleOCCT/SOWT Study/RecommendationBack in compliance
  15. 2019-12-12Lead and Copper RuleLead Consumer NoticeBack in compliance
  16. 2019-11-09Public NoticePN Violation for NPDWR ViolationBack in compliance
  17. 2019-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  18. 2019-05-18Public NoticePN Violation for NPDWR ViolationBack in compliance
  19. 2019-02-23Public NoticePN Violation for NPDWR ViolationBack in compliance
  20. 2019-01-01Lead and Copper RuleWater Quality Parameter M/RBack in compliance
  21. 2019-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  22. 2018-11-21Public NoticePN Violation for NPDWR ViolationBack in compliance
  23. 2018-11-05Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  24. 2018-10-01ArsenicMCL, Averagemeasured 0.0290 MG/L · limit 0.0100 MG/LPeriod ended · no return to compliance on file
  25. 2018-07-31Lead and Copper RuleOCCT/SOWT Study/RecommendationBack in compliance
Show the other 29 entries
  1. 2018-07-01ArsenicMCL, Averagemeasured 0.0380 MG/L · limit 0.0100 MG/LPeriod ended · no return to compliance on file
  2. 2018-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  3. 2018-06-02Public NoticePN Violation for NPDWR ViolationBack in compliance
  4. 2018-01-11Lead and Copper RuleOCCT/SOWT Study/RecommendationBack in compliance
  5. 2018-01-01ArsenicMCL, Averagemeasured 0.0560 MG/L · limit 0.0100 MG/LPeriod ended · no return to compliance on file
  6. 2017-12-14Lead and Copper RuleLead Consumer NoticeBack in compliance
  7. 2017-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  8. 2017-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  9. 2017-07-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  10. 2016-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  11. 2016-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  12. 2016-04-20Public NoticePN Violation for NPDWR ViolationBack in compliance
  13. 2016-04-17Public NoticePN Violation for NPDWR ViolationBack in compliance
  14. 2015-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  15. 2015-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  16. 2015-08-02Groundwater RuleFailure To Address DeficiencyBack in compliance
  17. 2015-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  18. 2015-01-01Lead and Copper RuleWater Quality Parameter M/RBack in compliance
  19. 2012-05-31Public NoticePN Violation for NPDWR ViolationBack in compliance
  20. 2012-04-01Lead and Copper RuleInitial, Follow-up, or Routine Source Water M/RBack in compliance
  21. 2012-01-25Public NoticePN Violation for NPDWR ViolationBack in compliance
  22. 2011-12-03Public NoticePN Violation for NPDWR ViolationBack in compliance
  23. 2011-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  24. 2011-04-08Groundwater RuleFailure To Address DeficiencyBack in compliance
  25. 2011-01-11Lead and Copper RulePublic EducationBack in compliance
  26. 2008-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  27. 2008-04-01Dbp Stage 2Monitoring, Routine (IDSE)Back in compliance
  28. 2008-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  29. 2006-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served2,850
Service connections950
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityCoushatta
EPA ZIP on file71019

Areas served

  • Bossier Parish

Reading this record

Sligo Water System Incorporated is a community water system that draws from groundwater and serves about 2,850 people in Coushatta, Louisiana. 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.