PlainEnviro

Los Alamos Water Quality

New Mexico

Health Violations

The tap water in Los Alamos, New Mexico is served by 3 EPA-regulated water systems covering approximately 25,743 people. 70 health-based violations are on record, most recently for 5200 in 2024. Data source: EPA Safe Drinking Water Information System.

3
Water Systems
25,743
Population Served
70
Total Violations
70
Health-Based Violations

Drinking water in Los Alamos, New Mexico is delivered through 3 EPA-regulated community water systems serving an estimated 25,743 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.

The SDWIS record for Los Alamos shows 70 total violations across all 3 systems, of which 70 are health-based, meaning either a Maximum Contaminant Level (MCL) was exceeded or a required treatment technique was not followed. Contaminants cited in health-based violations include 5200, 0700. 1 TRI-reporting industrial facility is also located within the city limits.

A past EPA violation does not mean the water is currently unsafe, utilities are required to notify customers and remediate under state primacy oversight. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the New Mexico drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.

Community Water Systems

System Name Pop. Served Violations Status
LOS ALAMOS MUNICIPAL WATER SYSTEM 25,000 0 Clean
REGINA MDWCA 705 64 Health
CIELO LINDO 38 6 Health

Does this city have health-based water violations?

Health-based violations indicate contaminant levels that exceeded EPA maximum contaminant levels (MCLs). This does not necessarily mean water is currently unsafe.

Contaminant Begin Date
5200 2024-10-17
0700 2024-10-11
0700 2024-10-11
0700 2024-10-11
0700 2024-10-11
0700 2024-10-11
0700 2024-10-11
0700 2024-10-11
0700 2024-10-11
0700 2024-03-31
0700 2019-04-27
0700 2019-04-27
0700 2019-04-27
0700 2019-04-27
0700 2017-11-29
0700 2017-11-29
0700 2017-11-29
0700 2017-11-29
0700 2017-11-29
0700 2017-11-29
0700 2017-09-03
0700 2017-09-03
0700 2017-09-03
0700 2017-09-03
0700 2017-09-03
0700 2017-09-03
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-04-19
0700 2015-01-22
0700 2015-01-22

TRI Facilities in Los Alamos

Facility Total Releases
U.S. Department of Energy Los Alamos National Laboratory 82.2K lbs

Frequently Asked Questions

Is Los Alamos, New Mexico water safe to drink? ▼
Los Alamos is served by 3 EPA-regulated water systems covering approximately 25,743 people. 70 health-based violations have been recorded. A past violation does not necessarily mean water is currently unsafe, systems are required to notify customers and resolve issues. Contact your local water utility for current status.
How many water violations does Los Alamos have? ▼
Los Alamos water systems have a total of 70 violations on record in the EPA Safe Drinking Water Information System, of which 70 are health-based (MCL exceedances). The remaining violations are monitoring or reporting violations.
What contaminants were found in Los Alamos water? ▼
Health-based violations for Los Alamos water systems include the following contaminants: 5200, 0700. Source: EPA Safe Drinking Water Information System (SDWIS).
How many water systems serve Los Alamos? ▼
3 EPA-regulated community water systems serve Los Alamos, New Mexico, collectively covering approximately 25,743 people. Data is from the EPA Safe Drinking Water Information System (SDWIS).
Where does Los Alamos get its drinking water? ▼
Los Alamos's water supply comes from 3 EPA-regulated community water systems. Source type data is not available for all systems. For detailed supply information, contact your local water utility. Source: EPA SDWIS.
Are there pollution sources near Los Alamos? ▼
Yes, 1 EPA Toxic Release Inventory (TRI) facility is registered in Los Alamos, New Mexico, reporting a combined 82.2K lbs of toxic chemical releases. TRI data reflects self-reported emissions; it does not measure exposure or health effects. Source: EPA TRI.

Related Guides

Understanding Water Quality Violations
What MCL violations mean and how to read EPA data
How to Check Environmental Quality
Step-by-step guide to checking your local environment
Understanding EPA Data
How EPA collects and publishes environmental data

About This Data

Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). Violations are reported by state agencies to EPA and include both health-based (MCL exceedances) and monitoring/reporting violations.

A reported violation does not necessarily mean water is currently unsafe to drink. Many violations are resolved quickly, and public water systems are required to notify customers of significant issues. For current water quality, contact your local water utility.

TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial