Community Water System · PWSID CA3701995

Willowside Terrace Water Association

Serves 100 peopleGroundwaterOwner: PrivateAlpine, 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 2014: 24 violations. 19 over the limit · 1 treatment lapse · 2 missed or late tests · 2 notices or reports. Most recent began 2024-10-17.

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

19Over the limit
1Treatment lapse1 open
2Missed or late test
2Notice 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

200520102014 · Over the limit: 62014 · Over the limit: 62014 · Over the limit: 62014 · Over the limit: 62014 · Over the limit: 62014 · Over the limit: 62014 · Notice or report: 12015 · Over the limit: 32015 · Over the limit: 32015 · Over the limit: 320152016 · Over the limit: 22016 · Over the limit: 22017 · Over the limit: 22017 · Over the limit: 22018 · Over the limit: 12018 · Missed or late test: 120202021 · Missed or late test: 12023 · Over the limit: 32023 · Over the limit: 32023 · Over the limit: 32024 · Over the limit: 22024 · Over the limit: 22024 · Treatment lapse: 12024 · Notice or report: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
79% over the limit · 194% treatment lapse · 18% missed or late test · 28% notice or report · 2

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 UraniumNitrate-NitriteNitrate2024-03-01 · Combined Uranium: measured 107.00 PCI/L vs limit 20.00 PCI/L (5.3×)2024-01-01 · Combined Uranium: measured 99.70 PCI/L vs limit 20.00 PCI/L (5.0×)2023-10-01 · Combined Uranium: measured 115.00 PCI/L vs limit 20.00 PCI/L (5.8×)2023-07-01 · Combined Uranium: measured 90.90 PCI/L vs limit 20.00 PCI/L (4.5×)2023-04-01 · Combined Uranium: measured 90.50 PCI/L vs limit 20.00 PCI/L (4.5×)2018-01-01 · Nitrate-Nitrite: measured 13.70 MG/L vs limit 12.00 MG/L (1.1×)2017-04-01 · Nitrate: measured 12.60 MG/L vs limit 10.00 MG/L (1.3×)2017-01-01 · Nitrate: measured 13.30 MG/L vs limit 10.00 MG/L (1.3×)2016-04-01 · Nitrate: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2016-01-01 · Nitrate: measured 14.30 MG/L vs limit 10.00 MG/L (1.4×)2015-07-01 · Nitrate: measured 57.00 MG/L vs limit 45.00 MG/L (1.3×)2015-04-01 · Nitrate: measured 46.40 MG/L vs limit 45.00 MG/L (1.0×)2015-01-01 · Nitrate: measured 45.50 MG/L vs limit 45.00 MG/L (1.0×)2014-07-01 · Nitrate: measured 70.80 MG/L vs limit 45.00 MG/L (1.6×)2014-07-01 · Nitrate-Nitrite: measured 16.00 MG/L vs limit 10.00 MG/L (1.6×)2014-04-01 · Nitrate: measured 62.55 MG/L vs limit 45.00 MG/L (1.4×)2014-04-01 · Nitrate-Nitrite: measured 13.90 MG/L vs limit 10.00 MG/L (1.4×)2014-02-01 · Nitrate-Nitrite: measured 35.60 MG/L vs limit 10.00 MG/L (3.6×)2014-01-01 · Nitrate-Nitrite: measured 11.80 MG/L vs limit 10.00 MG/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 2 results on file · action level 15 ppb

2.6 ppb
0 ppb

Open now (2)

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

Every violation on record

  1. 2024-10-17Lead service line inventoryRPTOpen
  2. 2024-10-17Lead service line inventoryTTOpen
  3. 2024-03-01Combined UraniumMCL, Averagemeasured 107.00 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  4. 2024-01-01Combined UraniumMCL, Averagemeasured 99.70 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  5. 2023-10-01Combined UraniumMCL, Averagemeasured 115.00 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  6. 2023-07-01Combined UraniumMCL, Averagemeasured 90.90 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  7. 2023-04-01Combined UraniumMCL, Averagemeasured 90.50 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  8. 2021-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  9. 2018-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  10. 2018-01-01Nitrate-NitriteMCL, Single Samplemeasured 13.70 MG/L · limit 12.00 MG/LPeriod ended · no return to compliance on file
  11. 2017-04-01NitrateMCL, Single Samplemeasured 12.60 MG/L · limit 10.00 MG/LBack in compliance
  12. 2017-01-01NitrateMCL, Single Samplemeasured 13.30 MG/L · limit 10.00 MG/LBack in compliance
  13. 2016-04-01NitrateMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  14. 2016-01-01NitrateMCL, Single Samplemeasured 14.30 MG/L · limit 10.00 MG/LBack in compliance
  15. 2015-07-01NitrateMCL, Single Samplemeasured 57.00 MG/L · limit 45.00 MG/LBack in compliance
  16. 2015-04-01NitrateMCL, Single Samplemeasured 46.40 MG/L · limit 45.00 MG/LBack in compliance
  17. 2015-01-01NitrateMCL, Single Samplemeasured 45.50 MG/L · limit 45.00 MG/LBack in compliance
  18. 2014-07-01NitrateMCL, Single Samplemeasured 70.80 MG/L · limit 45.00 MG/LBack in compliance
  19. 2014-07-01Nitrate-NitriteMCL, Single Samplemeasured 16.00 MG/L · limit 10.00 MG/LBack in compliance
  20. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  21. 2014-04-01NitrateMCL, Single Samplemeasured 62.55 MG/L · limit 45.00 MG/LBack in compliance
  22. 2014-04-01Nitrate-NitriteMCL, Single Samplemeasured 13.90 MG/L · limit 10.00 MG/LBack in compliance
  23. 2014-02-01Nitrate-NitriteMCL, Single Samplemeasured 35.60 MG/L · limit 10.00 MG/LBack in compliance
  24. 2014-01-01Nitrate-NitriteMCL, Averagemeasured 11.80 MG/L · limit 10.00 MG/LBack in compliance

System details

Population served100
Service connections32
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityAlpine
EPA ZIP on file91903

Areas served

  • San Diego County

Reading this record

Willowside Terrace Water Association is a community water system that draws from groundwater and serves about 100 people in Alpine, 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.