Contaminants

INORGANICS

Contaminant Sources

Inorganic contaminants in drinking water can result from the following:

Discharge from petroleum refineries
Dissolution of minerals in aquifers
Erosion of natural deposits
Discharge from metal refineries

Monitoring Requirements

Monitoring may be required once every three years or as determined by the WDNR.

Sampling Procedures

Samples are to be taken from the point of entry into the water system. All wells represented by the entry point must be running simultaneously during the sampling process and must run long enough prior to sampling to ensure a proper mix of all water.

1. If the sample faucet contains an aerator, it must be removed.

2. Run the water until it is cold, or for small systems, until the pump goes on.

3. Collect samples in appropriate bottles. Immediately preserve samples with the appropriate preservatives.

4. Print the system name or PWS ID number on the cap.

5. Complete all sample and request forms.

6. Follow all laboratory procedures for preservation and shipping.

Reporting Requirements

Upon receipt of the completed sample form from the laboratory, check to make sure the required testing was done (checked items on back of the form). Sign and date the form and submit it to the WDNR within ten days after completion of the test or within the following timeframes:

Ten days following the month in which the result is received.
Ten days following the end of a compliance period.

Report all MCL, monitoring and public notice violations to the WDNR within 24 hours. It is recommended that you retain a copy of the completed form for your records(click here for sample form in PDF format).

Treatment Options

Various types of treatment exist for inorganic contaminants depending on the type of contaminants and concentrations present, among other things. Some commonly used treatment options for inorganic contaminants include:

Health Effects

The health effects associated with the presence of inorganic compounds in drinking water depend on the contaminant and the levels found. Effects may include increased risk of cancer, damage to the liver, kidney, and circulatory systems, or damage to the intestinal or central nervous systems.