Twain Harte Community Services District
Published drinking-water records and contacts for Twain Harte Community Services District. System CA5510005. Review sources and dates; not a real-time water assessment.
- System ID
- CA5510005
- State or territory
- CA
- Published population served
- 2378
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 23 — 1993-01-01 – 2024-12-31
- California DDW laboratory results: 297 — 2026-01-04 – 2026-07-08
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 | 2022-01-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2019-01-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2019-01-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2016-01-01 – 2018-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2016-01-01 – 2018-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2013-01-01 – 2015-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2010-01-01 – 2012-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2007-01-01 – 2009-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| PERFLUORO PFMPA | < 2.000000000 NG/L | 2026-07-08 | SHADYBROOK RESERVOIR / California DDW laboratory results |
| PERFLUOROPENTANOIC ACID (PFPEA) | < 2.000000000 NG/L | 2026-07-08 | SECTION IV DITCH - RAW / California DDW laboratory results |
| PERFLUORONONANOIC ACID (PFNA) | < 2.000000000 NG/L | 2026-07-08 | SHADYBROOK RESERVOIR / California DDW laboratory results |
| PERFLUORODECANE SULFONIC ACID 8:2 FTS | < 2.000000000 NG/L | 2026-07-08 | SHADYBROOK RESERVOIR / California DDW laboratory results |
| PERFLUOROUNDECANOIC ACID (PFUNA) | < 2.000000000 NG/L | 2026-07-08 | SECTION IV DITCH - RAW / California DDW laboratory results |
| PERFLUORONONANOIC ACID (PFNA) | < 2.000000000 NG/L | 2026-07-08 | SECTION IV DITCH - RAW / California DDW laboratory results |
| PERFLUORODODECANOIC ACID (PFDOA) | < 2.000000000 NG/L | 2026-07-08 | SECTION IV DITCH - RAW / California DDW laboratory results |
| PERFLUORO PFEESA | < 2.000000000 NG/L | 2026-07-08 | SHADYBROOK RESERVOIR / California DDW laboratory results |
| NONAFLUORO NFDHA | < 2.000000000 NG/L | 2026-07-08 | SECTION IV DITCH - RAW / California DDW laboratory results |
| PERFLUORODECANOIC ACID (PFDA) | < 2.000000000 NG/L | 2026-07-08 | SHADYBROOK RESERVOIR / California DDW laboratory results |
| PERFLUOROHEXANOIC ACID (PFHXA) | < 2.000000000 NG/L | 2026-07-08 | SHADYBROOK RESERVOIR / California DDW laboratory results |
| 9CL-PF3ONS | < 2.000000000 NG/L | 2026-07-08 | SHADYBROOK RESERVOIR / 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
2 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 / Monitoring, Lab Certification/Method Error (RTCR) | 2025-04-01 – 2025-05-31 | Resolved | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1980-07-28 – 1980-08-27 | 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: 2026-10-18
Administrative contact (EPA filing)
Trott, Tom: 209-586-2172
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.