Los Alamos Municipal Water System
EPA ID: NM3500115 · 25,000 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Los Alamos Municipal Water System (NM3500115): no drinking-water violations recorded since 2021. EPA lists no violations for Los Alamos Municipal Water System, serving 25,000 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Los Alamos Municipal Water System Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Los Alamos Municipal Water System have a median household income of $142,911 and about 19,374 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 75% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Los Alamos Municipal Water System's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Wastewater Proximity Note: This service area ranks in the 70th percentile nationally for proximity to wastewater discharge points.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in New Mexico
System Overview
Los Alamos Municipal Water System (EPA ID: NM3500115) is a community water system in New Mexico that serves approximately 25,000 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0008 mg/L | No | 2024-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
2 of 2 ZIP records with known zones are in EPA Radon Zone 2.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by NM or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Los Alamos Municipal Water System (NM3500115) on EPA.gov.
Frequently Asked Questions
Is Los Alamos Municipal Water System water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Los Alamos Municipal Water System in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Los Alamos Municipal Water System serve?
Los Alamos Municipal Water System serves approximately 25,000 people across 2 ZIP codes in New Mexico.
Where does Los Alamos Municipal Water System get its water?
The primary water source is groundwater.
Federal UCMR5 PFAS Monitoring: No PFAS Reported Above Reporting Levels
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were reported above UCMR5 minimum reporting levels.
EPA's April 2024 PFAS rule sets MCLs of 4 ppt for PFOA and PFOS and 10 ppt for PFHxS, PFNA and HFPO-DA (GenX); water systems must comply from 2029. Other PFAS compounds have no individual federal MCL. A state standard is shown only where this system's state has its own enforceable PFAS limit. Detection results are EPA UCMR5 samples, not a measurement at your tap.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Los Alamos Municipal Water System, NM: Serves 25K People. https://zipcheckup.com/water-system/nm3500115/
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