Los Alamos Community Services District
Published drinking-water records and contacts for Los Alamos Community Services District. System CA4210002. Review sources and dates; not a real-time water assessment.
- System ID
- CA4210002
- State or territory
- CA
- Published population served
- 1534
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 38 — 1993-01-01 – 2025-12-31
- California DDW laboratory results: 119 — 2026-02-25 – 2026-05-20
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 | 2023-01-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2020-01-01 – 2022-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2017-01-01 – 2019-12-31 | 2026Q3 |
| Lead (PB90) | 0.0014 mg/L | 2014-01-01 – 2016-12-31 | 2026Q3 |
| Lead (PB90) | 0.0017 mg/L | 2011-01-01 – 2013-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2008-01-01 – 2010-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2009-01-01 – 2009-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2008-01-01 – 2008-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| NITRATE | 1.1 MG/L | 2026-05-20 | WELL 06 / California DDW laboratory results |
| NITRATE | 4.9 MG/L | 2026-05-20 | WELL 04 (1988) / California DDW laboratory results |
| NITRATE | 1.8 MG/L | 2026-05-20 | WELL 3A / California DDW laboratory results |
| PERFLUOROBUTANOIC ACID (PFBA) | < 1.800000000 NG/L | 2026-02-25 | WELL 05 / California DDW laboratory results |
| PERFLUOROCTANE SULFONIC ACID (PFOS) | < 1.700000000 NG/L | 2026-02-25 | WELL 04 (1988) / California DDW laboratory results |
| NETFOSAA | < 1.700000000 NG/L | 2026-02-25 | WELL 06 / California DDW laboratory results |
| PERFLUORO PFMBA | < 1.800000000 NG/L | 2026-02-25 | WELL 05 / California DDW laboratory results |
| PERFLUOROPENTANOIC ACID (PFPEA) | 5.3 NG/L | 2026-02-25 | WELL 06 / California DDW laboratory results |
| NONAFLUORO NFDHA | < 1.800000000 NG/L | 2026-02-25 | WELL 3A / California DDW laboratory results |
| ADONA | < 1.800000000 NG/L | 2026-02-25 | WELL 05 / California DDW laboratory results |
| PERFLUOROBUTANE SULFONIC ACID (PFBS) | < 1.800000000 NG/L | 2026-02-25 | WELL 05 / California DDW laboratory results |
| PERFLUORO PFEESA | < 1.800000000 NG/L | 2026-02-25 | WELL 3A / 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 |
|---|---|---|---|---|
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring, Routine (IDSE) | 2018-01-01 – 2018-12-31 | Resolved | No | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring, Routine (IDSE) | 2018-01-01 – 2018-12-31 | Resolved | 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)
Gomez, Juan Ramon: 805-344-4195
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.