Transient Non-Community · PWSID CA4800807

Self-Serve Petroleum

Serves 1,210 peopleGroundwaterOwner: PrivateSouth San Francisco, California
Nothing open right now.

On record since 1998: 7 violations. 2 over the limit · 3 missed or late tests · 2 notices or reports. Most recent began 2016-04-01.

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

2Over the limit
0Treatment lapse
3Missed or late test
2Notice or report

More violations on record than 83% 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

1998 · Missed or late test: 21998 · Missed or late test: 21998 · Notice or report: 120002005201020152016 · Over the limit: 22016 · Over the limit: 22016 · Missed or late test: 12016 · Notice or report: 120202025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
29% over the limit · 243% missed or late test · 329% 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×+Nitrate2016-04-01 · Nitrate: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2016-01-01 · Nitrate: measured 11.00 MG/L vs limit 10.00 MG/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.

Every violation on record

  1. 2016-04-01NitrateMCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  2. 2016-04-01NitrateMonitoring, RegularBack in compliance
  3. 2016-03-24Public NoticePN Violation for NPDWR ViolationBack in compliance
  4. 2016-01-01NitrateMCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  5. 1998-04-01Unknown contaminantVariance/Exemption/Other ComplianceBack in compliance
  6. 1998-01-01NitrateMonitoring, Check/Repeat/ConfirmationBack in compliance
  7. 1998-01-01NitrateMonitoring, RegularBack in compliance

System details

Population served1,210
Service connections1
Water sourceGroundwater
System typeTransient Non-Community
OwnerPrivate
StatusActive
CitySouth San Francisco
EPA ZIP on file94080

Areas served

  • Solano County

Reading this record

Self-Serve Petroleum is a transient non-community that draws from groundwater and serves about 1,210 people in South San Francisco, 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.