Non-Transient Non-Community · PWSID CA1900040

TN Truss

Serves 45 peopleGroundwaterOwner: PrivateGranada Hills, California
Nothing open right now.

On record since 2021: 10 violations. 9 over the limit · 1 missed or late test. Most recent began 2025-01-01.

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

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

More violations on record than 87% 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

20052010201520202021 · Missed or late test: 12023 · Over the limit: 42023 · Over the limit: 42023 · Over the limit: 42023 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42025 · Over the limit: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
90% over the limit · 910% missed or late test · 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×+Arsenic2023-01-01 · Arsenic: measured 55.00 UG/L vs limit 0.0100 UG/L (5500.0×)
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.

Every violation on record

  1. 2025-01-01ArsenicMCL, Averagemeasured 37.00 UG/LPeriod ended · no return to compliance on file
  2. 2024-10-01ArsenicMCL, Averagemeasured 59.00 UG/LPeriod ended · no return to compliance on file
  3. 2024-07-01ArsenicMCL, Averagemeasured 57.00 UG/LPeriod ended · no return to compliance on file
  4. 2024-04-01ArsenicMCL, Averagemeasured 73.00 UG/LPeriod ended · no return to compliance on file
  5. 2024-01-01ArsenicMCL, Averagemeasured 72.00 UG/LPeriod ended · no return to compliance on file
  6. 2023-10-01ArsenicMCL, Averagemeasured 48.00 UG/LPeriod ended · no return to compliance on file
  7. 2023-07-01ArsenicMCL, Averagemeasured 48.00 UG/LPeriod ended · no return to compliance on file
  8. 2023-04-01ArsenicMCL, Averagemeasured 66.00 UG/LPeriod ended · no return to compliance on file
  9. 2023-01-01ArsenicMCL, Averagemeasured 55.00 UG/L · limit 0.0100 UG/LPeriod ended · no return to compliance on file
  10. 2021-10-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance

System details

Population served45
Service connections2
Water sourceGroundwater
System typeNon-Transient Non-Community
OwnerPrivate
StatusActive
CityGranada Hills
EPA ZIP on file91344

Areas served

  • Los Angeles County

Reading this record

TN Truss is a non-transient non-community that draws from groundwater and serves about 45 people in Granada Hills, 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.