Community Water System · PWSID CA3200104

Grizzly Lake Csd-Delleker

Serves 1,314 peopleGroundwaterOwner: Local GovernmentPortola, California
Nothing open right now.

On record since 2016: 25 violations. 22 over the limit · 3 missed or late tests. Most recent began 2024-10-01.

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

22Over the limit
0Treatment lapse
3Missed or late test
0Notice or report

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

2005201020152016 · Over the limit: 42016 · Over the limit: 42016 · Over the limit: 42016 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42019 · Over the limit: 42019 · Over the limit: 42019 · Over the limit: 42019 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 420202021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42021 · Missed or late test: 12022 · Over the limit: 12023 · Over the limit: 12024 · Missed or late test: 22024 · Missed or late test: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
88% over the limit · 2212% missed or late test · 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 Uranium2023-07-01 · Combined Uranium: measured 24.10 PCI/L vs limit 20.00 PCI/L (1.2×)2022-01-01 · Combined Uranium: measured 24.60 PCI/L vs limit 20.00 PCI/L (1.2×)2021-10-01 · Combined Uranium: measured 28.10 PCI/L vs limit 20.00 PCI/L (1.4×)2021-07-01 · Combined Uranium: measured 28.40 PCI/L vs limit 20.00 PCI/L (1.4×)2021-04-01 · Combined Uranium: measured 28.90 PCI/L vs limit 20.00 PCI/L (1.4×)2021-01-01 · Combined Uranium: measured 27.80 PCI/L vs limit 20.00 PCI/L (1.4×)2020-10-01 · Combined Uranium: measured 24.70 PCI/L vs limit 20.00 PCI/L (1.2×)2020-07-01 · Combined Uranium: measured 24.20 PCI/L vs limit 20.00 PCI/L (1.2×)2020-04-01 · Combined Uranium: measured 24.20 PCI/L vs limit 20.00 PCI/L (1.2×)2020-01-01 · Combined Uranium: measured 25.10 PCI/L vs limit 20.00 PCI/L (1.3×)2019-10-01 · Combined Uranium: measured 25.90 PCI/L vs limit 20.00 PCI/L (1.3×)2019-07-01 · Combined Uranium: measured 27.00 PCI/L vs limit 20.00 PCI/L (1.4×)2019-04-01 · Combined Uranium: measured 26.20 PCI/L vs limit 20.00 PCI/L (1.3×)2019-01-01 · Combined Uranium: measured 28.20 PCI/L vs limit 20.00 PCI/L (1.4×)2017-10-01 · Combined Uranium: measured 29.20 PCI/L vs limit 20.00 PCI/L (1.5×)2017-07-01 · Combined Uranium: measured 29.40 PCI/L vs limit 20.00 PCI/L (1.5×)2017-04-01 · Combined Uranium: measured 29.60 PCI/L vs limit 20.00 PCI/L (1.5×)2017-01-01 · Combined Uranium: measured 26.00 PCI/L vs limit 20.00 PCI/L (1.3×)2016-04-01 · Combined Uranium: measured 22.70 PCI/L vs limit 20.00 PCI/L (1.1×)2016-01-01 · Combined Uranium: measured 20.50 PCI/L vs limit 20.00 PCI/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.

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

13 ppb
11 ppb
8.5 ppb
0 ppb

Every violation on record

  1. 2024-10-01Revised Total Coliform RuleMONBack in compliance
  2. 2024-09-01Revised Total Coliform RuleMONBack in compliance
  3. 2023-07-01Combined UraniumMCL, Averagemeasured 24.10 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  4. 2022-01-01Combined UraniumMCL, Averagemeasured 24.60 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  5. 2021-12-01Revised Total Coliform RuleMONBack in compliance
  6. 2021-10-01Combined UraniumMCL, Averagemeasured 28.10 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  7. 2021-07-01Combined UraniumMCL, Averagemeasured 28.40 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  8. 2021-04-01Combined UraniumMCL, Averagemeasured 28.90 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  9. 2021-01-01Combined UraniumMCL, Averagemeasured 27.80 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  10. 2020-10-01Combined UraniumMCL, Averagemeasured 24.70 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  11. 2020-07-01Combined UraniumMCL, Averagemeasured 24.20 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  12. 2020-04-01Combined UraniumMCL, Averagemeasured 24.20 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  13. 2020-01-01Combined UraniumMCL, Averagemeasured 25.10 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  14. 2019-10-01Combined UraniumMCL, Averagemeasured 25.90 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  15. 2019-07-01Combined UraniumMCL, Averagemeasured 27.00 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  16. 2019-04-01Combined UraniumMCL, Averagemeasured 26.20 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  17. 2019-01-01Combined UraniumMCL, Averagemeasured 28.20 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  18. 2017-10-01Combined UraniumMCL, Averagemeasured 29.20 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  19. 2017-07-01Combined UraniumMCL, Averagemeasured 29.40 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  20. 2017-04-01Combined UraniumMCL, Averagemeasured 29.60 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  21. 2017-01-01Combined UraniumMCL, Averagemeasured 26.00 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  22. 2016-10-01Combined UraniumMCL, Averagemeasured 22.90 PCI/LPeriod ended · no return to compliance on file
  23. 2016-07-01Combined UraniumMCL, Averagemeasured 21.30 PCI/LPeriod ended · no return to compliance on file
  24. 2016-04-01Combined UraniumMCL, Averagemeasured 22.70 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file
  25. 2016-01-01Combined UraniumMCL, Averagemeasured 20.50 PCI/L · limit 20.00 PCI/LPeriod ended · no return to compliance on file

System details

Population served1,314
Service connections351
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityPortola
EPA ZIP on file96122

Areas served

  • Plumas County

Reading this record

Grizzly Lake Csd-Delleker is a community water system that draws from groundwater and serves about 1,314 people in Portola, 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.