Know Your Environment. Protect Your Health.

Mercury (inorganic)

Colorado City Md

Mercury is a potent neurotoxin that also damages the kidneys and other internal organs. Mercury enters drinking water from industrial pollution, mining wastes and coal-fired power plants.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0233 ppb32ND - 0.0380 ppb
20190.0125 ppb21ND - 0.0250 ppb
20200.0350 ppb220.0310 ppb - 0.0390 ppb
2021ND20ND
20220.0310 ppb110.0310 ppb
2023ND20ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 1.2 ppb

The EWG Health Guideline of 1.2 ppb for mercury (inorganic) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.

EPA Maximum Contaminant
Level (MCL): 2 ppb

The legal limit for inorganic mercury, established in 1991, was based on toxicity studies conducted in laboratory animals in the 1970s and 1980s. This limit does not include any additional consideration of children’s health.

ppb = parts per billion

All test results

Date Result
2018-01-170.0380 ppb
2018-01-170.0320 ppb
2018-04-24ND
2019-01-29ND
2019-01-290.0250 ppb
2020-01-140.0310 ppb
2020-01-140.0390 ppb
2021-11-10ND
2021-11-10ND
2022-02-230.0310 ppb
2023-09-26ND
2023-10-02ND