The Power of Information

National Drinking Water Database

Selenium (total) in New Mexico

Selenium is a naturally occurring element that contaminates water due to mining or petrolum refining, fly-ash from coal-burning power plants, and irrigation of arid farmland soils high in selenium. [read more]

The Most Polluted Communities in New Mexico

133 water utilities reported detecting Selenium (total) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Selenium (total) level

RankSystem Population Served Positive test results of total reported tests Average Level
1Ilfeld Mdwca
Gallup, NM
4001 of 160 ppb
(60 ppb)
2Rosa Joint Ventures Water System
Ignacio, NM
2104 of 538 ppb
(0 to 80 ppb)
3Melrose Water System
Melrose, NM
7001 of 120 ppb
(20 ppb)
4Juan Road Water System
Albuquerque, NM
341 of 120 ppb
(20 ppb)
5Chaparral Mobile Home Park (Hobbs)
Hobbs, NM
391 of 112.25 ppb
(12.25 ppb)
6Las Alturas Estates
Las Cruces, NM
6501 of 112.05 ppb
(12.05 ppb)
7Triple J Mhp
Hobbs, NM
1051 of 111.8 ppb
(11.8 ppb)
8Desert Aire MD Water and Sewer Works Ass
Chapparral, NM
3761 of 110.42 ppb
(10.42 ppb)
9Country Cottage Care and Rehabilitation
Albuquerque, NM
751 of 110.2 ppb
(10.2 ppb)
10Glorieta Estates Water Co-Op
Glorietta, NM
611 of 110 ppb
(10 ppb)

Health Based Limits for Selenium (total)

Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.50 ppb
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.50 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.50 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.170 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.200 ppb

Violation Summary for Selenium (total) in New Mexico

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in New Mexico since 2004

Violation TypeNumber of Violations
Over maximum contaminant level, Single Sample2
Failure to monitor regularly2