Community Water System · PWSID TX0290005

Guadalupe Blanco River Authority

Surface WaterOwner: Local GovernmentCypress, Texas
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 2023: 20 violations. 9 over the limit · 2 treatment lapses · 4 missed or late tests · 5 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.

9Over the limit
2Treatment lapse1 open
4Missed or late test
5Notice or report2 open

More violations on record than 77% 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

20052010201520202023 · Over the limit: 22023 · Over the limit: 22023 · Missed or late test: 32023 · Missed or late test: 32023 · Missed or late test: 32023 · Notice or report: 12024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Treatment lapse: 12024 · Missed or late test: 12024 · Notice or report: 12025 · Over the limit: 32025 · Over the limit: 32025 · Over the limit: 32025 · Treatment lapse: 12025 · Notice or report: 32025 · Notice or report: 32025 · Notice or report: 32025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
45% over the limit · 910% treatment lapse · 220% missed or late test · 425% notice or report · 5

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 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)2025-04-01 · Trihalomethanes (TTHM): measured 0.0910 MG/L vs limit 0.0800 MG/L (1.1×)2025-01-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2024-10-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)2024-07-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2024-04-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)2024-01-01 · Trihalomethanes (TTHM): measured 0.0940 MG/L vs limit 0.0800 MG/L (1.2×)2023-10-01 · Trihalomethanes (TTHM): measured 0.0970 MG/L vs limit 0.0800 MG/L (1.2×)2023-04-01 · Trihalomethanes (TTHM): measured 0.0820 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.

Open now (3)

  1. 2025-05-01Public NoticePN Violation for NPDWR ViolationOpen
  2. 2024-10-17Lead service line inventoryRPTOpen
  3. 2024-10-17Lead service line inventoryTTOpen

Every violation on record

  1. 2025-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2025-05-31Public NoticePN Violation for NPDWR ViolationBack in compliance
  3. 2025-05-01Public NoticePN Violation for NPDWR ViolationOpen
  4. 2025-04-19Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 2025-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0910 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2025-04-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  7. 2025-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2024-10-17Lead service line inventoryRPTOpen
  9. 2024-10-17Lead service line inventoryTTOpen
  10. 2024-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2024-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  12. 2024-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  13. 2024-02-01Revised Total Coliform RuleMONBack in compliance
  14. 2024-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0940 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  15. 2023-12-26Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  16. 2023-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0970 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  17. 2023-08-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  18. 2023-07-15Public NoticePN Violation for NPDWR ViolationBack in compliance
  19. 2023-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LBack in compliance
  20. 2023-01-01Carbon, TotalMonitoring and Reporting (DBP)Back in compliance

System details

Population served0
Service connections9,613
Water sourceSurface Water
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityCypress
EPA ZIP on file77429-7080

Areas served

  • Calhoun County

Reading this record

Guadalupe Blanco River Authority is a community water system that draws from surface water and serves about 0 people in Cypress, 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.