Community Water System · PWSID CA5410034

Del Oro California Pines District

Serves 944 peopleGroundwaterOwner: PrivateChico, California
Nothing open right now.

On record since 1996: 16 violations. 6 over the limit · 9 missed or late tests · 1 notice or report. Most recent began 2011-10-01.

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

6Over the limit
0Treatment lapse
9Missed or late test
1Notice or report

More violations on record than 92% 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

1996 · Missed or late test: 11997 · Missed or late test: 11999 · Missed or late test: 12000 · Missed or late test: 12000 · Notice or report: 120002002 · Missed or late test: 22002 · Missed or late test: 22003 · Missed or late test: 22003 · Missed or late test: 22004 · Over the limit: 22004 · Over the limit: 22004 · Missed or late test: 120052008 · Over the limit: 12009 · Over the limit: 120102011 · Over the limit: 22011 · Over the limit: 2201520202025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
38% over the limit · 656% missed or late test · 96% notice or report · 1

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 Uranium2011-10-01 · Combined Uranium: measured 21.60 PCI/L vs limit 20.00 PCI/L (1.1×)2011-01-01 · Combined Uranium: measured 23.10 PCI/L vs limit 20.00 PCI/L (1.2×)2009-01-01 · Combined Uranium: measured 26.95 PCI/L vs limit 20.00 PCI/L (1.3×)2008-04-01 · Combined Uranium: measured 26.80 PCI/L vs limit 20.00 PCI/L (1.3×)
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

13.7 ppb
2.9 ppb
0.93 ppb

Every violation on record

  1. 2011-10-01Combined UraniumMCL, Averagemeasured 21.60 PCI/L · limit 20.00 PCI/LBack in compliance
  2. 2011-01-01Combined UraniumMCL, Averagemeasured 23.10 PCI/L · limit 20.00 PCI/LBack in compliance
  3. 2009-01-01Combined UraniumMCL, Averagemeasured 26.95 PCI/L · limit 20.00 PCI/LBack in compliance
  4. 2008-04-01Combined UraniumMCL, Averagemeasured 26.80 PCI/L · limit 20.00 PCI/LBack in compliance
  5. 2004-08-01Coliform (TCR)Monitoring, Repeat Minor (TCR)Back in compliance
  6. 2004-07-01Coliform (TCR)MCL, Monthly (TCR)Back in compliance
  7. 2004-06-01Coliform (TCR)MCL, Monthly (TCR)Back in compliance
  8. 2003-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  9. 2003-01-01NitrateMonitoring, RegularBack in compliance
  10. 2002-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  11. 2002-01-01NitrateMonitoring, RegularBack in compliance
  12. 2000-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  13. 2000-01-01NitrateMonitoring, RegularBack in compliance
  14. 1999-01-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  15. 1997-12-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  16. 1996-05-29Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance

System details

Population served944
Service connections286
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityChico
EPA ZIP on file95927

Areas served

  • Tulare County

Reading this record

Del Oro California Pines District is a community water system that draws from groundwater and serves about 944 people in Chico, 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.