Agenda - Council - 10/08/2019 - Laserfiche WebLink

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CONSUMER CONFIDENCE REPORT Monitoring Results — Unregulated Substances In addition to testing drinking water for contaminants regulated under the Safe Drinking Water Act, we sometimes also monitor for contaminants that are not regulated. Unregulated contaminants do not have legal limits for drinking water. Detection alone of a regulated or unregulated contaminant should not cause concern. The meaning of a detection should be determined considering current health effects information. We are often still learning about the health effects, so this information can change over time. The following table shows the unregulated contaminants we detected last year, as well as human -health based guidance values for comparison, where available. The comparison values are based only on potential health impacts and do not consider our ability to measure contaminants at very low concentrations or the cost and technology of prevention and/or treatment. They may be set at levels that are costly, challenging, or impossible for water systems to meet (for example, large-scale treatment technology may not exist for a given contaminant). A person drinking water with a contaminant at or below the comparison value would be at little or no risk for harmful health effects. If the level of a contaminant is above the comparison value, people of a certain age or with special health conditions - like a fetus, infants, children, elderly, and people with impaired immunity — may need to take extra precautions. Because these contaminants are unregulated, EPA and MDH require no particular action based on detection of an unregulated contaminant. We are notifying you of the unregulated contaminants we have detected as a public education opportunity. • More information is available on MDH's A-Z List of Contaminants in Water (https://www.health.state.mn.us/communities/environment/water/contaminants/index.html) and Fourth Unregulated Contaminant Monitoring Rule (UCMR 4) (https://www.health.state.mn.us/communities/environment/water/com/ucmr4.html). UNREGULATED CONTAMINANTS —Tested in drinking water. Contaminant Comparison Value Highest Average Result or Highest Single Test Result Range of Detected Test Results Manganese 100 ppb 296 ppb 20.70 - 365.00 ppb Sodium* 20 ppm 10.5 ppm N/A Sulfate 500 ppm 14.2 ppm N/A Group of 6 Haloacetic Acids (HAA6Br) N/A 0.37 ppb 0.00 - 0.56 ppb Group of 9 Haloacetic Acids (HAA9) N/A 1.49 ppb 0.68 - 2.03 ppb *Note that home water softening can increase the level of sodium in your water. PUBLIC WATER SUPPLY IDENTIFICATION (PWSID): 1020035 PAG E