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National Drinking Water Database


Molybdenum in Ohio


Molybdenum is a byproduct of copper and tungsten mining, and is used as an alloy for various metals; it also occurs naturally in soil and rock.

The Most Polluted Communities in Ohio

11 water utilities reported detecting Molybdenum in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Molybdenum level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Ohio-American Water Co. - Lake Darby
Westerville, OH
4,4951 of 151 ppb
(51 ppb)
2Ohio-American Water Co. - Timberbrook Pws
Westerville, OH
8651 of 141 ppb
(41 ppb)
3Ohio American Water Co. - Blacklick
Westerville, OH
9,1851 of 113 ppb
(13 ppb)
4Oh/Am Mansfield System 5
Marion, OH
1231 of 112 ppb
(12 ppb)
5Oh/Am Water Company-Mari
Marion, OH
48,0005 of 511.4 ppb
(9 to 15 ppb)
6Ohio American Water Co-Tiffin District
Tiffin, OH
18,1353 of 37.33 ppb
(7 to 8 ppb)
7Oawc- Lake White District Public Water System
Marion, OH
1,1001 of 16 ppb
(6 ppb)
8Ohio-American Water Co. - Worthington Hills
Westerville, OH
3,1241 of 15 ppb
(5 ppb)
9Ohio-American Water Co-Aurora East Pws
Kent, OH
9501 of 12 ppb
(2 ppb)
10Ohio-American Water Co. - Huber Ridge
Westerville, OH
6,9781 of 12 ppb
(2 ppb)

Health Based Limits for Molybdenum

StandardDescriptionLevel
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.40 ppb
Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.40 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.80 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.80 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 Molybdenum in Ohio

There are no violations reported for this contaminant in Ohio