Community Water System · PWSID CA2000293

Md 46 Ahwahnee Resorts

Serves 300 peopleGroundwaterOwner: Local GovernmentMadera, California
Nothing open right now.

On record since 2005: 59 violations. 29 over the limit · 30 missed or late tests. Most recent began 2017-11-01.

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

29Over the limit
0Treatment lapse
30Missed or late test
0Notice or report

More violations on record than 98% 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 · Missed or late test: 120052009 · Over the limit: 102009 · Over the limit: 102009 · Over the limit: 102009 · Over the limit: 102010 · Over the limit: 62010 · Over the limit: 620102011 · Over the limit: 22012 · Over the limit: 42012 · Over the limit: 42013 · Over the limit: 22013 · Missed or late test: 120152016 · Over the limit: 12016 · Missed or late test: 272016 · Missed or late test: 272016 · Missed or late test: 272016 · Missed or late test: 272016 · Missed or late test: 272016 · Missed or late test: 272016 · Missed or late test: 272016 · Missed or late test: 272016 · Missed or late test: 272017 · Over the limit: 42017 · Over the limit: 42017 · Missed or late test: 120202025
One square ≈ 3 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
49% over the limit · 2951% missed or late test · 30

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×+ArsenicCombined UraniumGross Alpha Particle Activity2017-11-01 · Arsenic: measured 0.0150 MG/L vs limit 0.0100 MG/L (1.5×)2017-09-01 · Arsenic: measured 0.0140 MG/L vs limit 0.0100 MG/L (1.4×)2017-06-01 · Arsenic: measured 0.0170 MG/L vs limit 0.0100 MG/L (1.7×)2017-05-01 · Arsenic: measured 0.0140 MG/L vs limit 0.0100 MG/L (1.4×)2016-12-01 · Arsenic: measured 0.0190 MG/L vs limit 0.0100 MG/L (1.9×)2013-01-01 · Combined Uranium: measured 20.50 PCI/L vs limit 20.00 PCI/L (1.0×)2013-01-01 · Combined Uranium: measured 26.00 PCI/L vs limit 20.00 PCI/L (1.3×)2012-04-01 · Combined Uranium: measured 21.25 PCI/L vs limit 20.00 PCI/L (1.1×)2012-04-01 · Combined Uranium: measured 26.75 PCI/L vs limit 20.00 PCI/L (1.3×)2012-01-01 · Combined Uranium: measured 23.00 PCI/L vs limit 20.00 PCI/L (1.1×)2012-01-01 · Combined Uranium: measured 30.50 PCI/L vs limit 20.00 PCI/L (1.5×)2011-01-01 · Combined Uranium: measured 25.25 PCI/L vs limit 20.00 PCI/L (1.3×)2011-01-01 · Combined Uranium: measured 33.00 PCI/L vs limit 20.00 PCI/L (1.6×)2010-10-01 · Combined Uranium: measured 29.00 PCI/L vs limit 20.00 PCI/L (1.4×)2010-10-01 · Combined Uranium: measured 22.50 PCI/L vs limit 20.00 PCI/L (1.1×)2010-07-01 · Combined Uranium: measured 30.20 PCI/L vs limit 20.00 PCI/L (1.5×)2010-07-01 · Combined Uranium: measured 23.45 PCI/L vs limit 20.00 PCI/L (1.2×)2010-04-01 · Combined Uranium: measured 21.95 PCI/L vs limit 20.00 PCI/L (1.1×)2010-03-01 · Combined Uranium: measured 29.45 PCI/L vs limit 20.00 PCI/L (1.5×)2009-10-01 · Gross Alpha Particle Activity: measured 28.00 PCI/L vs limit 15.00 PCI/L (1.9×)2009-10-01 · Gross Alpha Particle Activity: measured 29.00 PCI/L vs limit 15.00 PCI/L (1.9×)2009-07-01 · Combined Uranium: measured 27.20 PCI/L vs limit 20.00 PCI/L (1.4×)2009-03-01 · Combined Uranium: measured 25.93 PCI/L vs limit 20.00 PCI/L (1.3×)2009-01-01 · Combined Uranium: measured 27.20 PCI/L vs limit 20.00 PCI/L (1.4×)2009-01-01 · Combined Uranium: measured 21.87 PCI/L vs limit 20.00 PCI/L (1.1×)2009-01-01 · Gross Alpha Particle Activity: measured 21.00 PCI/L vs limit 15.00 PCI/L (1.4×)2009-01-01 · Gross Alpha Particle Activity: measured 16.30 PCI/L vs limit 15.00 PCI/L (1.1×)2009-01-01 · Gross Alpha Particle Activity: measured 25.00 PCI/L vs limit 15.00 PCI/L (1.7×)2009-01-01 · Gross Alpha Particle Activity: measured 18.00 PCI/L vs limit 15.00 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

1 ppb
1 ppb
0.8 ppb

Every violation on record

  1. 2017-11-01ArsenicMCL, Single Samplemeasured 0.0150 MG/L · limit 0.0100 MG/LBack in compliance
  2. 2017-10-01ArsenicMonitoring, RegularBack in compliance
  3. 2017-09-01ArsenicMCL, Single Samplemeasured 0.0140 MG/L · limit 0.0100 MG/LBack in compliance
  4. 2017-06-01ArsenicMCL, Single Samplemeasured 0.0170 MG/L · limit 0.0100 MG/LBack in compliance
  5. 2017-05-01ArsenicMCL, Single Samplemeasured 0.0140 MG/L · limit 0.0100 MG/LBack in compliance
  6. 2016-12-01ArsenicMCL, Single Samplemeasured 0.0190 MG/L · limit 0.0100 MG/LBack in compliance
  7. 2016-01-01StyreneMonitoring, RegularPeriod ended · no return to compliance on file
  8. 2016-01-01EthylbenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  9. 2016-01-01TolueneMonitoring, RegularPeriod ended · no return to compliance on file
  10. 2016-01-01BenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  11. 2016-01-01ChlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  12. 2016-01-011,1,2,2-TetrachloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2016-01-01TetrachloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  14. 2016-01-011,1,2-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  15. 2016-01-01TrichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  16. 2016-01-011,2-DichloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  17. 2016-01-01Carbon tetrachlorideMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2016-01-011,1,1-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2016-01-011,2-DichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2016-01-01trans-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2016-01-011,1-DichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2016-01-011,1-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  23. 2016-01-01Vinyl chlorideMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2016-01-01p-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2016-01-01o-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
Show the other 24 entries
  1. 2016-01-01DichloromethaneMonitoring, RegularPeriod ended · no return to compliance on file
  2. 2016-01-01Xylenes, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  3. 2016-01-01TrichlorotrifluoroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  4. 2016-01-011, 3-DichloropropeneMonitoring, RegularPeriod ended · no return to compliance on file
  5. 2016-01-01cis-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  6. 2016-01-011,2,4-TrichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  7. 2016-01-01Methyl Tert-Butyl EtherMonitoring, RegularPeriod ended · no return to compliance on file
  8. 2016-01-01TrichlorofluoromethaneMonitoring, RegularPeriod ended · no return to compliance on file
  9. 2013-04-01Combined UraniumMonitoring, RegularBack in compliance
  10. 2013-01-01Combined Uranium ×2MCL, Averagemeasured 20.50 PCI/L · limit 20.00 PCI/LBack in compliance
  11. 2012-04-01Combined UraniumMCL, Averagemeasured 21.25 PCI/L · limit 20.00 PCI/LBack in compliance
  12. 2012-04-01Combined UraniumMCL, Single Samplemeasured 26.75 PCI/L · limit 20.00 PCI/LBack in compliance
  13. 2012-01-01Combined Uranium ×2MCL, Averagemeasured 23.00 PCI/L · limit 20.00 PCI/LBack in compliance
  14. 2011-01-01Combined Uranium ×2MCL, Averagemeasured 25.25 PCI/L · limit 20.00 PCI/LBack in compliance
  15. 2010-10-01Combined Uranium ×2MCL, Averagemeasured 29.00 PCI/L · limit 20.00 PCI/LBack in compliance
  16. 2010-07-01Combined Uranium ×2MCL, Averagemeasured 30.20 PCI/L · limit 20.00 PCI/LBack in compliance
  17. 2010-04-01Combined UraniumMCL, Averagemeasured 21.95 PCI/L · limit 20.00 PCI/LBack in compliance
  18. 2010-03-01Combined UraniumMCL, Averagemeasured 29.45 PCI/L · limit 20.00 PCI/LBack in compliance
  19. 2009-10-01Gross Alpha Particle Activity ×2MCL, Single Samplemeasured 28.00 PCI/L · limit 15.00 PCI/LBack in compliance
  20. 2009-07-01Combined UraniumMCL, Averagemeasured 27.20 PCI/L · limit 20.00 PCI/LBack in compliance
  21. 2009-03-01Combined UraniumMCL, Averagemeasured 25.93 PCI/L · limit 20.00 PCI/LBack in compliance
  22. 2009-01-01Combined Uranium ×2MCL, Averagemeasured 27.20 PCI/L · limit 20.00 PCI/LBack in compliance
  23. 2009-01-01Gross Alpha Particle Activity ×4MCL, Single Samplemeasured 21.00 PCI/L · limit 15.00 PCI/LBack in compliance
  24. 2005-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance

System details

Population served300
Service connections90
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityMadera
EPA ZIP on file93637

Areas served

  • Madera County

Reading this record

Md 46 Ahwahnee Resorts is a community water system that draws from groundwater and serves about 300 people in Madera, 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.