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National Drinking Water Database


Chromium (total) in Oregon


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 Oregon

67 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)
1City of Myrtle Creek
Myrtle Creek, OR
3,4601 of 127 ppb
(27 ppb)
2Canyon City Water Department
Canyon City, OR
6401 of 17.55 ppb
(7.55 ppb)
3Willamettans, The
Springfirld, OR
601 of 27 ppb
(0 to 14 ppb)
4Wisemans Mobile Court
Colfax, OR
1001 of 24 ppb
(0 to 8 ppb)
5Hidden Meadows Subdivision
OR
261 of 13.5 ppb
(3.5 ppb)
6Raintree Estates
Corvallis, OR
503 of 33.37 ppb
(2.3 to 5.24 ppb)
7River Village Mhp
Ontario, OR
281 of 33.37 ppb
(0 to 10.1 ppb)
8City of Haines
Haines, OR
4262 of 22.5 ppb
(2 to 3 ppb)
9Big Valley Woods Water Corp
Boring, OR
3501 of 22.5 ppb
(0 to 5 ppb)
10City of Nyssa
Nyssa, OR
3,1702 of 32.5 ppb
(0 to 6 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 Oregon

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

Violation TypeNumber of Violations
Failure to monitor regularly59