Community Water System · PWSID CA1500406

Tradewind Water Assoc.

Serves 632 peopleGroundwaterOwner: PrivateWeldon, California
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 2007: 23 violations. 12 over the limit · 2 treatment lapses · 6 missed or late tests · 3 notices or reports. Most recent began 2025-04-01.

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

12Over the limit
2Treatment lapse1 open
6Missed or late test
3Notice or report1 open

More violations on record than 94% of active water systems in California. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

20052007 · Notice or report: 12008 · Over the limit: 22008 · Over the limit: 22008 · Missed or late test: 12008 · Notice or report: 120102012 · Missed or late test: 12014 · Missed or late test: 22014 · Missed or late test: 220152018 · Treatment lapse: 120202021 · Over the limit: 12021 · Missed or late test: 22021 · Missed or late test: 22022 · Over the limit: 42022 · Over the limit: 42022 · Over the limit: 42022 · Over the limit: 42024 · Over the limit: 32024 · Over the limit: 32024 · Over the limit: 32024 · Treatment lapse: 12024 · Notice or report: 12025 · Over the limit: 22025 · Over the limit: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
52% over the limit · 129% treatment lapse · 226% missed or late test · 613% notice or report · 3

Across California, 52% of violations are missed or late tests and 29% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Combined Uranium2008-07-01 · Combined Uranium: measured 21.00 PCI/L vs limit 20.00 PCI/L (1.1×)2008-04-01 · Combined Uranium: measured 23.50 PCI/L vs limit 20.00 PCI/L (1.2×)
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 3 results on file · action level 15 ppb

8.8 ppb
6.1 ppb
4 ppb

Open now (2)

  1. 2024-10-17Lead service line inventoryRPTOpen
  2. 2024-10-17Lead service line inventoryTTOpen

Every violation on record

  1. 2025-04-01Combined UraniumMCL, Averagemeasured 22.00 PCI/LPeriod ended · no return to compliance on file
  2. 2025-01-01Combined UraniumMCL, Averagemeasured 22.00 PCI/LPeriod ended · no return to compliance on file
  3. 2024-10-17Lead service line inventoryRPTOpen
  4. 2024-10-17Lead service line inventoryTTOpen
  5. 2024-10-01Combined UraniumMCL, Averagemeasured 21.00 PCI/LPeriod ended · no return to compliance on file
  6. 2024-07-01Combined UraniumMCL, Averagemeasured 21.00 PCI/LBack in compliance
  7. 2024-04-01Combined UraniumMCL, Averagemeasured 21.00 PCI/LPeriod ended · no return to compliance on file
  8. 2022-10-01Combined UraniumMCL, Averagemeasured 22.00 PCI/LPeriod ended · no return to compliance on file
  9. 2022-07-01Combined UraniumMCL, Averagemeasured 23.00 PCI/LPeriod ended · no return to compliance on file
  10. 2022-04-01Combined UraniumMCL, Averagemeasured 24.00 PCI/LPeriod ended · no return to compliance on file
  11. 2022-01-01Combined UraniumMCL, Averagemeasured 23.00 PCI/LPeriod ended · no return to compliance on file
  12. 2021-10-01Combined UraniumMCL, Averagemeasured 23.00 PCI/LPeriod ended · no return to compliance on file
  13. 2021-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  14. 2021-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  15. 2018-01-01Lead and Copper RuleLead Service Line Replacement (LSLR)Back in compliance
  16. 2014-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  17. 2014-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  18. 2012-01-01NitrateMonitoring, RegularBack in compliance
  19. 2008-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  20. 2008-07-01Combined UraniumMCL, Averagemeasured 21.00 PCI/L · limit 20.00 PCI/LBack in compliance
  21. 2008-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  22. 2008-04-01Combined UraniumMCL, Averagemeasured 23.50 PCI/L · limit 20.00 PCI/LBack in compliance
  23. 2007-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served632
Service connections219
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityWeldon
EPA ZIP on file93283

Areas served

  • Kern County

Reading this record

Tradewind Water Assoc. is a community water system that draws from groundwater and serves about 632 people in Weldon, California. 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.