Community Water System · PWSID TX0460019

Clwsc Canyon Lake Shores

Serves 44,196 peopleSurface WaterOwner: PrivateCanyon Lake, Texas
Nothing open right now.

On record since 2003: 81 violations. 1 over the limit · 2 treatment lapses · 75 missed or late tests · 3 notices or reports. Most recent began 2025-07-01.

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

1Over the limit
2Treatment lapse
75Missed or late test
3Notice or report

More violations on record than 95% of active water systems in Texas. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2003 · Notice or report: 12005 · Notice or report: 120052010 · Missed or late test: 12010 · Notice or report: 120102012 · Missed or late test: 1201520202021 · Missed or late test: 72021 · Missed or late test: 72023 · Missed or late test: 632023 · Missed or late test: 632023 · Missed or late test: 632023 · Missed or late test: 632023 · Missed or late test: 632023 · Missed or late test: 632023 · Missed or late test: 632023 · Missed or late test: 632023 · Missed or late test: 632023 · Missed or late test: 632023 · Missed or late test: 632024 · Missed or late test: 22025 · Over the limit: 12025 · Treatment lapse: 22025 · Missed or late test: 12025
One square ≈ 6 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
1% over the limit · 12% treatment lapse · 293% missed or late test · 754% notice or report · 3

Across Texas, 60% of violations are missed or late tests and 10% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)2025-07-01 · Trihalomethanes (TTHM): measured 0.1130 MG/L vs limit 0.0800 MG/L (1.4×)
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 4 results on file · action level 15 ppb

2.8 ppb
2.7 ppb
2 ppb
2 ppb

Every violation on record

  1. 2025-07-01Surface water filtration (IESWTR)Single Turbidity Exceed (Enhanced SWTR)Back in compliance
  2. 2025-07-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  3. 2025-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1130 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  4. 2025-02-04Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  5. 2024-10-01Revised Total Coliform RuleMONBack in compliance
  6. 2024-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  7. 2023-01-01CyanideMonitoring, RegularPeriod ended · no return to compliance on file
  8. 2023-01-01SeleniumMonitoring, RegularPeriod ended · no return to compliance on file
  9. 2023-01-01ZincMonitoring, RegularPeriod ended · no return to compliance on file
  10. 2023-01-01Thallium, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  11. 2023-01-01Beryllium, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  12. 2023-01-01Antimony, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2023-01-01SilverMonitoring, RegularPeriod ended · no return to compliance on file
  14. 2023-01-01MercuryMonitoring, RegularPeriod ended · no return to compliance on file
  15. 2023-01-01ManganeseMonitoring, RegularPeriod ended · no return to compliance on file
  16. 2023-01-01IronMonitoring, RegularPeriod ended · no return to compliance on file
  17. 2023-01-01ChromiumMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2023-01-01CadmiumMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2023-01-01BariumMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2023-01-01ArsenicMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2023-01-01AluminumMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2023-01-01TdsMonitoring, RegularPeriod ended · no return to compliance on file
  23. 2023-01-01SulfateMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2023-01-01FluorideMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2023-01-01ChlorideMonitoring, RegularPeriod ended · no return to compliance on file
Show the other 34 entries
  1. 2023-01-01Nitrate ×2Monitoring, RegularPeriod ended · no return to compliance on file
  2. 2023-01-01Styrene ×2Monitoring, RegularPeriod ended · no return to compliance on file
  3. 2023-01-01Ethylbenzene ×2Monitoring, RegularPeriod ended · no return to compliance on file
  4. 2023-01-01Toluene ×2Monitoring, RegularPeriod ended · no return to compliance on file
  5. 2023-01-01Benzene ×2Monitoring, RegularPeriod ended · no return to compliance on file
  6. 2023-01-01Chlorobenzene ×2Monitoring, RegularPeriod ended · no return to compliance on file
  7. 2023-01-01Tetrachloroethylene ×2Monitoring, RegularPeriod ended · no return to compliance on file
  8. 2023-01-011,1,2-Trichloroethane ×2Monitoring, RegularPeriod ended · no return to compliance on file
  9. 2023-01-01Trichloroethylene ×2Monitoring, RegularPeriod ended · no return to compliance on file
  10. 2023-01-011,2-Dichloropropane ×2Monitoring, RegularPeriod ended · no return to compliance on file
  11. 2023-01-01Carbon tetrachloride ×2Monitoring, RegularPeriod ended · no return to compliance on file
  12. 2023-01-011,1,1-Trichloroethane ×2Monitoring, RegularPeriod ended · no return to compliance on file
  13. 2023-01-011,2-Dichloroethane ×2Monitoring, RegularPeriod ended · no return to compliance on file
  14. 2023-01-01trans-1,2-Dichloroethylene ×2Monitoring, RegularPeriod ended · no return to compliance on file
  15. 2023-01-011,1-Dichloroethylene ×2Monitoring, RegularPeriod ended · no return to compliance on file
  16. 2023-01-01Vinyl chloride ×2Monitoring, RegularPeriod ended · no return to compliance on file
  17. 2023-01-01p-Dichlorobenzene ×2Monitoring, RegularPeriod ended · no return to compliance on file
  18. 2023-01-01o-Dichlorobenzene ×2Monitoring, RegularPeriod ended · no return to compliance on file
  19. 2023-01-01Dichloromethane ×2Monitoring, RegularPeriod ended · no return to compliance on file
  20. 2023-01-01Xylenes, Total ×2Monitoring, RegularPeriod ended · no return to compliance on file
  21. 2023-01-01cis-1,2-Dichloroethylene ×2Monitoring, RegularPeriod ended · no return to compliance on file
  22. 2023-01-011,2,4-Trichlorobenzene ×2Monitoring, RegularPeriod ended · no return to compliance on file
  23. 2021-10-01Revised Total Coliform RuleMONBack in compliance
  24. 2021-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  25. 2021-01-01AldicarbMonitoring, RegularPeriod ended · no return to compliance on file
  26. 2021-01-01CarbofuranMonitoring, RegularPeriod ended · no return to compliance on file
  27. 2021-01-01Aldicarb sulfoneMonitoring, RegularPeriod ended · no return to compliance on file
  28. 2021-01-01Aldicarb sulfoxideMonitoring, RegularPeriod ended · no return to compliance on file
  29. 2021-01-01OxamylMonitoring, RegularPeriod ended · no return to compliance on file
  30. 2012-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  31. 2010-09-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  32. 2010-09-01E. ColiMonitoring, Source Water (GWR)Back in compliance
  33. 2005-04-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  34. 2003-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served44,196
Service connections14,732
Water sourceSurface Water
System typeCommunity Water System
OwnerPrivate
StatusActive
CityCanyon Lake
EPA ZIP on file78133-0005

Areas served

  • Comal County

Reading this record

Clwsc Canyon Lake Shores is a community water system that draws from surface water and serves about 44,196 people in Canyon Lake, Texas. 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.