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National Drinking Water Database


Chromium (total) in Maryland


Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits. [read more]

The Most Polluted Communities in Maryland

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

Ranked by highest average Chromium (total) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Queens Castle Mobile Home Park
Darlington, MD
601 of 210.65 ppb
(0 to 21.3 ppb)
2Mount Carmel Woods
La Plata, MD
1801 of 48.75 ppb
(0 to 35 ppb)
3Graymount Apartments
Perryville, MD
271 of 18.5 ppb
(8.5 ppb)
4West White Plains
White Plains, MD
501 of 17.1 ppb
(7.1 ppb)
5Town of Union Bridge
Union Bridge, MD
9971 of 16.7 ppb
(6.7 ppb)
6Fruitland
Fruitland, MD
3,9001 of 16 ppb
(6 ppb)
7Wakefield Valley
Westminster, MD
2,6001 of 15.6 ppb
(5.6 ppb)
8Eastern Correctional Institute
Westover, MD
3,5001 of 35 ppb
(0 to 15 ppb)
9Crellin
Mountain Lake Park, MD
2301 of 25 ppb
(0 to 10 ppb)
10Villages AT Leonardtown
Hollywood, MD
2281 of 25 ppb
(0 to 10 ppb)

Health Based Limits for Chromium (total)

StandardDescriptionLevel
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.100 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.100 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.100 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.1000 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.1000 ppb

Violation Summary for Chromium (total) in Maryland

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

Violation TypeNumber of Violations
Failure to monitor regularly11