Community Water System · PWSID CA2300590

Surfwood Mutual Water Corporation

Serves 160 peopleSurface WaterOwner: PrivateMendocino, California
Nothing open right now.

On record since 2015: 45 violations. 45 over the limit. Most recent began 2023-04-01.

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

45Over the limit
0Treatment lapse
0Missed or late test
0Notice or report

More violations on record than 97% 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

200520102015 · Over the limit: 72015 · Over the limit: 72015 · Over the limit: 72015 · Over the limit: 72015 · Over the limit: 72015 · Over the limit: 72015 · Over the limit: 720152016 · Over the limit: 82016 · Over the limit: 82016 · Over the limit: 82016 · Over the limit: 82016 · Over the limit: 82016 · Over the limit: 82016 · Over the limit: 82016 · Over the limit: 82017 · Over the limit: 82017 · Over the limit: 82017 · Over the limit: 82017 · Over the limit: 82017 · Over the limit: 82017 · Over the limit: 82017 · Over the limit: 82017 · Over the limit: 82018 · Over the limit: 82018 · Over the limit: 82018 · Over the limit: 82018 · Over the limit: 82018 · Over the limit: 82018 · Over the limit: 82018 · Over the limit: 82018 · Over the limit: 82019 · Over the limit: 72019 · Over the limit: 72019 · Over the limit: 72019 · Over the limit: 72019 · Over the limit: 72019 · Over the limit: 72019 · Over the limit: 72020 · Over the limit: 22020 · Over the limit: 220202021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42023 · Over the limit: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
100% over the limit · 45

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×+Trihalomethanes (TTHM)Total Haloacetic Acids (HAA5)2023-04-01 · Trihalomethanes (TTHM): measured 90.00 UG/L vs limit 80.00 UG/L (1.1×)2021-10-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2021-07-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2021-04-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)2021-01-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2020-04-01 · Trihalomethanes (TTHM): measured 0.0898 MG/L vs limit 0.0800 MG/L (1.1×)2020-01-01 · Trihalomethanes (TTHM): measured 0.0933 MG/L vs limit 0.0800 MG/L (1.2×)2019-10-01 · Trihalomethanes (TTHM): measured 0.1060 MG/L vs limit 0.0800 MG/L (1.3×)2017-07-01 · Trihalomethanes (TTHM): measured 103.50 UG/L vs limit 80.00 UG/L (1.3×)2017-07-01 · Total Haloacetic Acids (HAA5): measured 113.00 UG/L vs limit 60.00 UG/L (1.9×)2016-10-01 · Total Haloacetic Acids (HAA5): measured 0.0760 MG/L vs limit 0.0600 MG/L (1.3×)2016-10-01 · Trihalomethanes (TTHM): measured 0.0910 MG/L vs limit 0.0800 MG/L (1.1×)2016-07-01 · Total Haloacetic Acids (HAA5): measured 0.0670 MG/L vs limit 0.0600 MG/L (1.1×)2016-07-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2016-01-01 · Total Haloacetic Acids (HAA5): measured 68.00 UG/L vs limit 60.00 UG/L (1.1×)2016-01-01 · Trihalomethanes (TTHM): measured 88.00 UG/L vs limit 80.00 UG/L (1.1×)
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 6 results on file · action level 15 ppb

18 ppb
6.9 ppb
3.6 ppb
0 ppb
0 ppb
0 ppb

Every violation on record

  1. 2023-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 90.00 UG/L · limit 80.00 UG/LBack in compliance
  2. 2021-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  3. 2021-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  4. 2021-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  5. 2021-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2020-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0898 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  7. 2020-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0933 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1060 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  9. 2019-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 71.30 UG/LPeriod ended · no return to compliance on file
  10. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 114.50 UG/LPeriod ended · no return to compliance on file
  11. 2019-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 81.60 UG/LPeriod ended · no return to compliance on file
  12. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 112.00 UG/LPeriod ended · no return to compliance on file
  13. 2019-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 103.60 UG/LPeriod ended · no return to compliance on file
  14. 2019-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 110.80 UG/LPeriod ended · no return to compliance on file
  15. 2018-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 103.60 UG/LPeriod ended · no return to compliance on file
  16. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 108.30 UG/LPeriod ended · no return to compliance on file
  17. 2018-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 99.50 UG/LPeriod ended · no return to compliance on file
  18. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 99.50 UG/LPeriod ended · no return to compliance on file
  19. 2018-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 95.50 UG/LPeriod ended · no return to compliance on file
  20. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 90.00 UG/LPeriod ended · no return to compliance on file
  21. 2018-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 89.00 UG/LPeriod ended · no return to compliance on file
  22. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 87.50 UG/LPeriod ended · no return to compliance on file
  23. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 95.00 UG/LPeriod ended · no return to compliance on file
  24. 2017-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 109.00 UG/LPeriod ended · no return to compliance on file
  25. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 103.50 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
Show the other 20 entries
  1. 2017-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 113.00 UG/L · limit 60.00 UG/LPeriod ended · no return to compliance on file
  2. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 106.80 UG/LPeriod ended · no return to compliance on file
  3. 2017-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 113.00 UG/LPeriod ended · no return to compliance on file
  4. 2017-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 102.50 UG/LPeriod ended · no return to compliance on file
  5. 2017-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 98.50 UG/LPeriod ended · no return to compliance on file
  6. 2016-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0760 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  7. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0910 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2016-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0670 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  9. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  10. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 94.30 UG/LPeriod ended · no return to compliance on file
  11. 2016-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 75.00 UG/LPeriod ended · no return to compliance on file
  12. 2016-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 68.00 UG/L · limit 60.00 UG/LBack in compliance
  13. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 88.00 UG/L · limit 80.00 UG/LBack in compliance
  14. 2015-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 84.50 UG/LBack in compliance
  15. 2015-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 104.50 UG/LBack in compliance
  16. 2015-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 88.30 UG/LBack in compliance
  17. 2015-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 100.80 UG/LBack in compliance
  18. 2015-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 84.80 UG/LBack in compliance
  19. 2015-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 100.80 UG/LBack in compliance
  20. 2015-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 101.50 UG/LBack in compliance

System details

Population served160
Service connections109
Water sourceSurface Water
System typeCommunity Water System
OwnerPrivate
StatusActive
CityMendocino
EPA ZIP on file95460

Areas served

  • Mendocino County

Reading this record

Surfwood Mutual Water Corporation is a community water system that draws from surface water and serves about 160 people in Mendocino, 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.