Community Water System · PWSID CA3700934

Pauma Valley Water Company

Serves 185 peopleGroundwaterOwner: PrivatePauma Valley, California
2 open treatment violations.

Open for: Surface water treatment (LT2), Surface water filtration (IESWTR). 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 2005: 70 violations. 48 over the limit · 2 treatment lapses · 17 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.

48Over the limit
2Treatment lapse2 open
17Missed or late test
3Notice or report

More violations on record than 99% 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

2005 · Notice or report: 120052010 · Treatment lapse: 220102011 · Missed or late test: 12014 · Notice or report: 12015 · Notice or report: 120152016 · Over the limit: 22016 · Missed or late test: 122016 · Missed or late test: 122016 · Missed or late test: 122016 · Missed or late test: 122016 · Missed or late test: 122016 · Missed or late test: 122017 · Over the limit: 42017 · Over the limit: 42017 · Missed or late test: 42017 · Missed or late test: 42018 · Over the limit: 32018 · Over the limit: 32020 · Over the limit: 42020 · Over the limit: 420202021 · Over the limit: 32021 · Over the limit: 32022 · Over the limit: 82022 · Over the limit: 82022 · Over the limit: 82022 · Over the limit: 82023 · Over the limit: 142023 · Over the limit: 142023 · Over the limit: 142023 · Over the limit: 142023 · Over the limit: 142023 · Over the limit: 142023 · Over the limit: 142024 · Over the limit: 72024 · Over the limit: 72024 · Over the limit: 72024 · Over the limit: 72025 · Over the limit: 32025 · Over the limit: 32025
One square ≈ 2 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
69% over the limit · 483% treatment lapse · 224% missed or late test · 174% 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×+SeleniumNitrateTotal Haloacetic Acids (HAA5)2025-07-01 · Selenium: measured 0.0670 UG/L vs limit 0.0500 UG/L (1.3×)2025-04-01 · Nitrate: measured 15.00 MG/L vs limit 10.00 MG/L (1.5×)2025-01-01 · Nitrate: measured 14.80 MG/L vs limit 10.00 MG/L (1.5×)2024-10-01 · Nitrate: measured 17.00 MG/L vs limit 10.00 MG/L (1.7×)2024-07-01 · Selenium: measured 0.0630 MG/L vs limit 0.0500 MG/L (1.3×)2024-07-01 · Nitrate: measured 16.00 MG/L vs limit 10.00 MG/L (1.6×)2024-04-01 · Selenium: measured 0.0590 MG/L vs limit 0.0500 MG/L (1.2×)2024-04-01 · Nitrate: measured 17.00 MG/L vs limit 10.00 MG/L (1.7×)2024-01-01 · Nitrate: measured 25.00 MG/L vs limit 10.00 MG/L (2.5×)2023-10-01 · Nitrate: measured 17.00 MG/L vs limit 10.00 MG/L (1.7×)2023-10-01 · Selenium: measured 190.00 UG/L vs limit 50.00 UG/L (3.8×)2023-07-01 · Selenium: measured 200.00 UG/L vs limit 50.00 UG/L (4.0×)2023-07-01 · Total Haloacetic Acids (HAA5): measured 63.70 UG/L vs limit 60.00 UG/L (1.1×)2023-07-01 · Total Haloacetic Acids (HAA5): measured 91.20 UG/L vs limit 60.00 UG/L (1.5×)2023-07-01 · Nitrate: measured 17.00 MG/L vs limit 10.00 MG/L (1.7×)2023-04-01 · Total Haloacetic Acids (HAA5): measured 72.90 UG/L vs limit 60.00 UG/L (1.2×)2023-04-01 · Total Haloacetic Acids (HAA5): measured 85.50 UG/L vs limit 60.00 UG/L (1.4×)2023-04-01 · Nitrate: measured 18.00 MG/L vs limit 10.00 MG/L (1.8×)2023-04-01 · Selenium: measured 130.00 UG/L vs limit 50.00 UG/L (2.6×)2023-01-01 · Total Haloacetic Acids (HAA5): measured 66.30 UG/L vs limit 60.00 UG/L (1.1×)2023-01-01 · Total Haloacetic Acids (HAA5): measured 81.40 UG/L vs limit 60.00 UG/L (1.4×)2023-01-01 · Nitrate: measured 18.00 MG/L vs limit 10.00 MG/L (1.8×)2023-01-01 · Selenium: measured 95.00 UG/L vs limit 50.00 UG/L (1.9×)2022-10-01 · Nitrate: measured 14.00 MG/L vs limit 10.00 MG/L (1.4×)2022-10-01 · Selenium: measured 130.00 UG/L vs limit 50.00 UG/L (2.6×)2022-07-01 · Nitrate: measured 15.00 MG/L vs limit 10.00 MG/L (1.5×)2022-07-01 · Selenium: measured 110.00 UG/L vs limit 50.00 UG/L (2.2×)2022-04-01 · Nitrate: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2022-04-01 · Selenium: measured 120.00 UG/L vs limit 50.00 UG/L (2.4×)2022-01-01 · Nitrate: measured 13.00 MG/L vs limit 10.00 MG/L (1.3×)2022-01-01 · Selenium: measured 110.00 UG/L vs limit 50.00 UG/L (2.2×)2021-07-01 · Nitrate: measured 22.00 MG/L vs limit 10.00 MG/L (2.2×)2021-04-01 · Nitrate: measured 16.00 MG/L vs limit 10.00 MG/L (1.6×)2021-01-01 · Nitrate: measured 17.00 MG/L vs limit 10.00 MG/L (1.7×)2020-10-01 · Nitrate: measured 15.00 MG/L vs limit 10.00 MG/L (1.5×)2020-07-01 · Nitrate: measured 15.00 MG/L vs limit 10.00 MG/L (1.5×)2020-04-01 · Nitrate: measured 18.00 MG/L vs limit 10.00 MG/L (1.8×)2020-01-01 · Nitrate: measured 18.00 MG/L vs limit 10.00 MG/L (1.8×)2018-04-01 · Nitrate: measured 17.70 MG/L vs limit 10.00 MG/L (1.8×)2018-01-01 · Nitrate: measured 14.80 MG/L vs limit 10.00 MG/L (1.5×)2017-10-01 · Nitrate: measured 12.90 MG/L vs limit 10.00 MG/L (1.3×)2017-07-01 · Nitrate: measured 11.10 MG/L vs limit 10.00 MG/L (1.1×)2017-04-01 · Nitrate: measured 17.20 MG/L vs limit 10.00 MG/L (1.7×)2017-01-01 · Nitrate: measured 15.90 MG/L vs limit 10.00 MG/L (1.6×)2016-04-01 · Nitrate: measured 14.80 MG/L vs limit 10.00 MG/L (1.5×)2016-01-01 · Nitrate: measured 14.50 MG/L vs limit 10.00 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 3 results on file · action level 15 ppb

2.7 ppb
0.9 ppb
0 ppb

Open now (2)

  1. 2010-06-22Surface water treatment (LT2)Treatment Technique Uncovered ReservoirOpen
  2. 2010-06-22Surface water filtration (IESWTR)Treatment Technique Uncovered ReservoirOpen

Every violation on record

  1. 2025-07-01SeleniumMCL, Averagemeasured 0.0670 UG/L · limit 0.0500 UG/LPeriod ended · no return to compliance on file
  2. 2025-04-01NitrateMCL, Single Samplemeasured 15.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  3. 2025-01-01NitrateMCL, Single Samplemeasured 14.80 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  4. 2024-10-01NitrateMCL, Single Samplemeasured 17.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  5. 2024-07-01SeleniumMCL, Averagemeasured 0.0630 MG/L · limit 0.0500 MG/LPeriod ended · no return to compliance on file
  6. 2024-07-01NitrateMCL, Single Samplemeasured 16.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  7. 2024-04-01SeleniumMCL, Averagemeasured 0.0590 MG/L · limit 0.0500 MG/LPeriod ended · no return to compliance on file
  8. 2024-04-01NitrateMCL, Single Samplemeasured 17.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  9. 2024-01-01NitrateMCL, Single Samplemeasured 25.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  10. 2024-01-01SeleniumMCL, Averagemeasured 29.00 UG/LPeriod ended · no return to compliance on file
  11. 2023-10-01NitrateMCL, Single Samplemeasured 17.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  12. 2023-10-01SeleniumMCL, Averagemeasured 190.00 UG/L · limit 50.00 UG/LPeriod ended · no return to compliance on file
  13. 2023-07-01SeleniumMCL, Averagemeasured 200.00 UG/L · limit 50.00 UG/LPeriod ended · no return to compliance on file
  14. 2023-07-01Total Haloacetic Acids (HAA5) ×2MCL, Averagemeasured 63.70 UG/L · limit 60.00 UG/LBack in compliance
  15. 2023-07-01NitrateMCL, Single Samplemeasured 17.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  16. 2023-04-01Total Haloacetic Acids (HAA5) ×2MCL, Averagemeasured 72.90 UG/L · limit 60.00 UG/LBack in compliance
  17. 2023-04-01NitrateMCL, Single Samplemeasured 18.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  18. 2023-04-01SeleniumMCL, Averagemeasured 130.00 UG/L · limit 50.00 UG/LPeriod ended · no return to compliance on file
  19. 2023-01-01Total Haloacetic Acids (HAA5) ×2MCL, Averagemeasured 66.30 UG/L · limit 60.00 UG/LBack in compliance
  20. 2023-01-01NitrateMCL, Single Samplemeasured 18.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  21. 2023-01-01SeleniumMCL, Averagemeasured 95.00 UG/L · limit 50.00 UG/LPeriod ended · no return to compliance on file
  22. 2022-10-01NitrateMCL, Single Samplemeasured 14.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  23. 2022-10-01SeleniumMCL, Averagemeasured 130.00 UG/L · limit 50.00 UG/LPeriod ended · no return to compliance on file
  24. 2022-07-01NitrateMCL, Single Samplemeasured 15.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  25. 2022-07-01SeleniumMCL, Averagemeasured 110.00 UG/L · limit 50.00 UG/LPeriod ended · no return to compliance on file
Show the other 42 entries
  1. 2022-04-01NitrateMCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  2. 2022-04-01SeleniumMCL, Averagemeasured 120.00 UG/L · limit 50.00 UG/LPeriod ended · no return to compliance on file
  3. 2022-01-01NitrateMCL, Single Samplemeasured 13.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  4. 2022-01-01SeleniumMCL, Averagemeasured 110.00 UG/L · limit 50.00 UG/LPeriod ended · no return to compliance on file
  5. 2021-07-01NitrateMCL, Single Samplemeasured 22.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  6. 2021-04-01NitrateMCL, Single Samplemeasured 16.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  7. 2021-01-01NitrateMCL, Single Samplemeasured 17.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  8. 2020-10-01NitrateMCL, Single Samplemeasured 15.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  9. 2020-07-01NitrateMCL, Single Samplemeasured 15.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  10. 2020-04-01NitrateMCL, Single Samplemeasured 18.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  11. 2020-01-01NitrateMCL, Single Samplemeasured 18.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  12. 2018-07-01NitrateMCL, Single Samplemeasured 10.00 MG/LPeriod ended · no return to compliance on file
  13. 2018-04-01NitrateMCL, Single Samplemeasured 17.70 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  14. 2018-01-01NitrateMCL, Single Samplemeasured 14.80 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  15. 2017-10-01NitrateMCL, Single Samplemeasured 12.90 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  16. 2017-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  17. 2017-07-01NitrateMCL, Single Samplemeasured 11.10 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  18. 2017-04-01NitrateMCL, Single Samplemeasured 17.20 MG/L · limit 10.00 MG/LBack in compliance
  19. 2017-01-01NitriteMonitoring, RegularBack in compliance
  20. 2017-01-01NitrateMCL, Single Samplemeasured 15.90 MG/L · limit 10.00 MG/LBack in compliance
  21. 2017-01-01Combined UraniumMonitoring, RegularBack in compliance
  22. 2017-01-01Gross Alpha Particle ActivityMonitoring, RegularBack in compliance
  23. 2016-04-01NitrateMCL, Single Samplemeasured 14.80 MG/L · limit 10.00 MG/LBack in compliance
  24. 2016-01-01NitrateMCL, Single Samplemeasured 14.50 MG/L · limit 10.00 MG/LBack in compliance
  25. 2016-01-01Combined UraniumMonitoring, RegularBack in compliance
  26. 2016-01-01Gross Alpha Particle ActivityMonitoring, RegularBack in compliance
  27. 2016-01-01BenzeneMonitoring, RegularBack in compliance
  28. 2016-01-01Methyl Tert-Butyl EtherMonitoring, RegularPeriod ended · no return to compliance on file
  29. 2016-01-01ChromiumMonitoring, RegularBack in compliance
  30. 2016-01-01ArsenicMonitoring, RegularBack in compliance
  31. 2016-01-01TdsMonitoring, RegularPeriod ended · no return to compliance on file
  32. 2016-01-01OdorMonitoring, RegularPeriod ended · no return to compliance on file
  33. 2016-01-01ManganeseMonitoring, RegularPeriod ended · no return to compliance on file
  34. 2016-01-01IronMonitoring, RegularPeriod ended · no return to compliance on file
  35. 2016-01-01NitrateMonitoring, RegularBack in compliance
  36. 2016-01-01NitriteMonitoring, RegularBack in compliance
  37. 2015-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  38. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  39. 2011-06-05Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  40. 2010-06-22Surface water treatment (LT2)Treatment Technique Uncovered ReservoirOpen
  41. 2010-06-22Surface water filtration (IESWTR)Treatment Technique Uncovered ReservoirOpen
  42. 2005-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served185
Service connections74
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityPauma Valley
EPA ZIP on file92061

Areas served

  • San Diego County

Reading this record

Pauma Valley Water Company is a community water system that draws from groundwater and serves about 185 people in Pauma Valley, 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.