Los Alamos Municipal Water System
Published drinking-water records and contacts for Los Alamos Municipal Water System. System NM3500115. Review sources and dates; not a real-time water assessment.
- System ID
- NM3500115
- State or territory
- NM
- Published population served
- 25000
- System type (source code)
- CWS
Published records and dates
- PFAS / lithium (EPA UCMR 5): 180 — 2023-01-19 – 2023-07-28
- Lead and copper monitoring summaries: 18 — 1992-07-01 – 2026-12-31
- New Mexico selected chemical sample panels: 48 — 2026-01-20 – 2026-03-31
Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.
Read the provider’s annual water quality report
Report link listed: 2026-10-17. This is not the report’s sampling date.
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
| Substance | Published result | Reporting limit | Sample date | Sampling location |
|---|---|---|---|---|
| 11Cl-PF3OUdS | < 0.005 µg/L | 0.005 µg/L | 2023-07-28 | Tsankawi Pit / SP001150311 |
| 4:2 FTS | < 0.003 µg/L | 0.003 µg/L | 2023-07-28 | Otowi Booster #2 / SP001150301 |
| 6:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2023-07-28 | Pajarito Booster #2 / SP001150231 |
| 8:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2023-07-28 | Tsankawi Pit / SP001150311 |
| 9Cl-PF3ONS | < 0.002 µg/L | 0.002 µg/L | 2023-07-28 | Otowi Booster #2 / SP001150301 |
| ADONA | < 0.003 µg/L | 0.003 µg/L | 2023-07-28 | Tsankawi Pit / SP001150311 |
| HFPO-DA | < 0.005 µg/L | 0.005 µg/L | 2023-07-28 | Pajarito Booster #2 / SP001150231 |
| NEtFOSAA | < 0.005 µg/L | 0.005 µg/L | 2023-07-28 | Pajarito Booster #2 / SP001150231 |
| NFDHA | < 0.02 µg/L | 0.02 µg/L | 2023-07-28 | Pajarito Booster #2 / SP001150231 |
| NMeFOSAA | < 0.006 µg/L | 0.006 µg/L | 2023-07-28 | Pajarito Booster #2 / SP001150231 |
| PFBA | < 0.005 µg/L | 0.005 µg/L | 2023-07-28 | Otowi Booster #2 / SP001150301 |
| PFBS | < 0.003 µg/L | 0.003 µg/L | 2023-07-28 | Pajarito Booster #2 / SP001150231 |
| PFDA | < 0.003 µg/L | 0.003 µg/L | 2023-07-28 | Pajarito Booster #2 / SP001150231 |
| PFDoA | < 0.003 µg/L | 0.003 µg/L | 2023-07-28 | Otowi Booster #2 / SP001150301 |
| PFEESA | < 0.003 µg/L | 0.003 µg/L | 2023-07-28 | Pajarito Booster #2 / SP001150231 |
| PFHpA | < 0.003 µg/L | 0.003 µg/L | 2023-07-28 | Otowi Booster #2 / SP001150301 |
| PFHpS | < 0.003 µg/L | 0.003 µg/L | 2023-07-28 | Pajarito Booster #2 / SP001150231 |
| PFHxA | < 0.003 µg/L | 0.003 µg/L | 2023-07-28 | Tsankawi Pit / SP001150311 |
| PFHxS | < 0.003 µg/L | 0.003 µg/L | 2023-07-28 | Otowi Booster #2 / SP001150301 |
| PFMBA | < 0.003 µg/L | 0.003 µg/L | 2023-07-28 | Tsankawi Pit / SP001150311 |
| PFMPA | < 0.004 µg/L | 0.004 µg/L | 2023-07-28 | Tsankawi Pit / SP001150311 |
| PFNA | < 0.004 µg/L | 0.004 µg/L | 2023-07-28 | Tsankawi Pit / SP001150311 |
| PFOA | < 0.004 µg/L | 0.004 µg/L | 2023-07-28 | Pajarito Booster #2 / SP001150231 |
| PFOS | < 0.004 µg/L | 0.004 µg/L | 2023-07-28 | Tsankawi Pit / SP001150311 |
| PFPeA | < 0.003 µg/L | 0.003 µg/L | 2023-07-28 | Tsankawi Pit / SP001150311 |
| PFPeS | < 0.004 µg/L | 0.004 µg/L | 2023-07-28 | Tsankawi Pit / SP001150311 |
| PFTA | < 0.008 µg/L | 0.008 µg/L | 2023-07-28 | Otowi Booster #2 / SP001150301 |
| PFTrDA | < 0.007 µg/L | 0.007 µg/L | 2023-07-28 | Pajarito Booster #2 / SP001150231 |
| PFUnA | < 0.002 µg/L | 0.002 µg/L | 2023-07-28 | Tsankawi Pit / SP001150311 |
| lithium | 26.6 µg/L | 9 µg/L | 2023-07-28 | Pajarito Booster #2 / SP001150231 |
Download all EPA UCMR 5 records (CSV)
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) | 0.0013 mg/L | 2024-01-01 – 2026-12-31 | 2026Q3 |
| Lead (PB90) | 0.00077 mg/L | 2022-01-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0.0009 mg/L | 2019-01-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0.001 mg/L | 2016-01-01 – 2018-12-31 | 2026Q3 |
| Lead (PB90) | 0.00091 mg/L | 2015-01-01 – 2017-12-31 | 2026Q3 |
| Lead (PB90) | 0.0016 mg/L | 2012-01-01 – 2014-12-31 | 2026Q3 |
| Lead (PB90) | 0.0025 mg/L | 2011-01-01 – 2013-12-31 | 2026Q3 |
| Lead (PB90) | 0.00187833 mg/L | 2008-01-01 – 2010-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| NITRATE-NITRITE | 0.46 mg/L | 2026-03-31 | SP001150311 / New Mexico selected chemical sample panels |
| NITRATE-NITRITE | 0.35 mg/L | 2026-03-31 | SP001150231 / New Mexico selected chemical sample panels |
| ARSENIC | 0.001 mg/L | 2026-03-31 | SP001150311 / New Mexico selected chemical sample panels |
| BARIUM | 0.12 mg/L | 2026-03-31 | SP001150311 / New Mexico selected chemical sample panels |
| CADMIUM | < 0.001 mg/L | 2026-03-31 | SP001150311 / New Mexico selected chemical sample panels |
| CHROMIUM | < 0.02 mg/L | 2026-03-31 | SP001150311 / New Mexico selected chemical sample panels |
| MERCURY | < 0.0002 mg/L | 2026-03-31 | SP001150311 / New Mexico selected chemical sample panels |
| NICKEL | < 0.01 mg/L | 2026-03-31 | SP001150311 / New Mexico selected chemical sample panels |
| SELENIUM | < 0.005 mg/L | 2026-03-31 | SP001150311 / New Mexico selected chemical sample panels |
| SODIUM | 21.00 mg/L | 2026-03-31 | SP001150311 / New Mexico selected chemical sample panels |
| ANTIMONY, TOTAL | < 0.001 mg/L | 2026-03-31 | SP001150311 / New Mexico selected chemical sample panels |
| BERYLLIUM, TOTAL | < 0.001 mg/L | 2026-03-31 | SP001150311 / New Mexico selected chemical sample panels |
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 |
|---|---|---|---|---|
| Inorganic Chemicals / Monitoring, Regular | 1981-07-01 – 1984-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1980-07-01 – 1983-06-30 | 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
- New Mexico selected chemical sample panels — last successful check: 2026-10-11
Administrative contact (EPA filing)
Gomez, David: 505-662-8157
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.