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National Drinking Water Database


Manganese in Iowa


Manganese is a naturally occurring element released from mineral deposits as well as industrial use.

The Most Polluted Communities in Iowa

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

Ranked by highest average Manganese level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Glidden Water Supply
Glidden, IA
1,2531 of 11300 ppb
(1300 ppb)
2Ida Grove Water Utility
Ida Grove, IA
2,3651 of 1700 ppb
(700 ppb)
3Lake Panorama Water Company
Panora, IA
2,2001 of 1595 ppb
(595 ppb)
4Carroll Municipal Water Supply
Carroll, IA
10,0981 of 1536 ppb
(536 ppb)
5Nevada Water Supply
Nevada, IA
6,6581 of 1488 ppb
(488 ppb)
6Cambridge Water Supply
Cambridge, IA
8191 of 1409 ppb
(409 ppb)
7Storm Lake Water Treatment Plant
Storm Lake, IA
10,3291 of 1370 ppb
(370 ppb)
8Rock Valley Rural Water District
Rock Valle, IA
1,8121 of 1280 ppb
(280 ppb)
9Delaware Municipal Water Supply
Oelwein, IA
1881 of 1280 ppb
(280 ppb)
10Granger Muni Water Supply
Granger, IA
5832 of 2228.5 ppb
(198 to 259 ppb)

Health Based Limits for Manganese

StandardDescriptionLevel
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.50 ppb
National Secondary Drinking Water RegulationsA National Secondary Drinking Water Regulation is a non-enforceable guideline regarding contaminants that may cause cosmetic effects (such as taste, odor, or color). Some states choose to adopt them as enforceable standards. 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.300 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.300 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
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.1600 ppb

Violation Summary for Manganese in Iowa

There are no violations reported for this contaminant in Iowa