Thomas Mountain Water Company
Published drinking-water records and contacts for Thomas Mountain Water Company. System CA3301676. Review sources and dates; not a real-time water assessment.
- System ID
- CA3301676
- State or territory
- CA
- Published population served
- 157
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 5 — 2012-01-01 – 2026-12-31
- California DDW laboratory results: 32 — 2026-01-20 – 2026-07-07
Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.
Published testing results
Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.
“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example
Lead and copper: 90th-percentile summaries
These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile
| Substance | Published 90th percentile | Monitoring period | Source quarter |
|---|---|---|---|
| Lead (PB90) | 0 mg/L | 2024-01-01 – 2026-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2021-01-01 – 2023-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2018-01-01 – 2020-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2015-01-01 – 2017-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2012-01-01 – 2014-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| NITRATE | 2.2 MG/L | 2026-07-07 | WELL #2 / California DDW laboratory results |
| NITRATE | 2.2 MG/L | 2026-04-17 | WELL #2 / California DDW laboratory results |
| PERFLUOROBUTANOIC ACID (PFBA) | < 2.000000000 NG/L | 2026-03-18 | WELL #2 / California DDW laboratory results |
| PERFLUOROHEPTANOIC ACID (PFHPA) | < 2.000000000 NG/L | 2026-03-18 | WELL #2 / California DDW laboratory results |
| PERFLUORO PFMBA | < 2.000000000 NG/L | 2026-03-18 | WELL #2 / California DDW laboratory results |
| PERFLUORO PFMPA | < 2.000000000 NG/L | 2026-03-18 | WELL #2 / California DDW laboratory results |
| NETFOSAA | < 5.000000000 NG/L | 2026-03-18 | WELL #2 / California DDW laboratory results |
| PERFLUORODODECANOIC ACID (PFDOA) | < 2.000000000 NG/L | 2026-03-18 | WELL #2 / California DDW laboratory results |
| HFPO-DA | < 2.000000000 NG/L | 2026-03-18 | WELL #2 / California DDW laboratory results |
| 9CL-PF3ONS | < 2.000000000 NG/L | 2026-03-18 | WELL #2 / California DDW laboratory results |
| PERFLUORODECANE SULFONIC ACID 8:2 FTS | < 5.000000000 NG/L | 2026-03-18 | WELL #2 / California DDW laboratory results |
| PERFLUOROBUTANE SULFONIC ACID (PFBS) | < 2.000000000 NG/L | 2026-03-18 | WELL #2 / California DDW laboratory results |
State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.
Download state records with source notes (CSV)
Published compliance history
23 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.
| Rule / record | Period | Recorded status | Health-based (EPA classification) | Source quarter |
|---|---|---|---|---|
| Revised Total Coliform Rule / Treatment Technique, Level 1 Assessment (RTCR) | 2022-10-23 – — | Unaddressed | Yes | 2026Q3 |
| Nitrate Rule / Monitoring, Regular | 2017-07-01 – 2017-09-30 | Resolved | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-09-01 – 1984-09-30 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-08-01 – 1984-08-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-07-01 – 1984-07-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-06-01 – 1984-06-30 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-05-01 – 1984-05-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-04-01 – 1984-04-30 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-03-01 – 1984-03-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-02-01 – 1984-02-29 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-01-01 – 1984-01-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1983-12-01 – 1983-12-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1983-11-01 – 1983-11-30 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1983-09-01 – 1983-09-30 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1983-07-01 – 1983-07-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1983-06-01 – 1983-06-30 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1983-03-01 – 1983-03-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1983-02-01 – 1983-02-28 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1983-01-01 – 1983-01-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1982-12-01 – 1982-12-31 | Archived | No | 2026Q3 |
Source dates and refresh checks
A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.
- EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
- EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
- EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17
- California DDW laboratory results — last successful check: 2026-10-17
Administrative contact (EPA filing)
Andersen, Patty: 951-468-0262
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.