Inorganic Contaminants (IOCs) are elements or compounds found in water supplies and may be natural in the geology or caused by activities of man through mining, industry or agriculture. It is common to have trace amounts of many Inorganic Contaminants in water supplies. Amounts above the Maximum Contaminant Levels may cause a variety of damaging effects to the liver, kidney, nervous system circulatory system, blood, gastrointestinal system, bones, or skin depending upon the inorganic contaminant and level of exposure. Some Inorganic Contaminants are more damaging to infants and pregnant women. Because of some special aspects of the rules for asbestos, fluoride, and nitrates, separate pages can be found for them on this web site.
This rule includes community and non-community systems that use groundwater sources. Groundwater sources include wells, springs, galleries, and any other water sources that are not regulated under the Surface Water Treatment Rule. Systems must comply with the requirements of the GWR beginning December 1, 2009.
There are three major areas of concern for your system-
Yes, all community and non-transient non-community public water supply systems must monitor for regulated Inorganic Contaminants in their water supply. At the present there are 15 regulated Inorganic Contaminants (including fluoride, arsenic, and nitrates).
|Asbestos||7 million fibers/L|
|Nitrite (as N)||1 mg/L|
|Nitrate & Nitrite (combined)||10 mg/L|
The rules for Inorganic Contaminants are contained in 40 CFR 141.11, 141.23, 141.62.