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The City of Mound draws water from four deep water wells, and has two water towers plus a standpipe that can store 965,000 gallons of water.
In November 2006, the City received notification from the Department of Health that the average annual level of arsenic in Well #7 was 10.8 ppb which exceeded the MCL of 10.0 ppb. Since the City’s existing and future water demand needs can be adequately met by the recently upgraded Wells #3 and #8, Well #7 will now only be used as an emergency/ backup well.
Mound drinking water is extremely hard with 24-28gpg hardness. Iron is another natural mineral in Mound water with concentrations ranging between 0.2-0.8ppm. In areas with over 0.3ppm, discolored laundry, stained fixtures, and a metallic taste or smell may be noticed.
The EPA has established two standards for additional contaminants in tap water:
MCL: Maximum Contaminant Level - The maximum allowable level of a certain contaminant
MCLG: Maximum Contaminant Level GOAL - The level where studies have found ZERO HEALTH RISKS, aka the "Health Limit"
Certain contaminants that absorb easily through your skin have been highlighted in orange. For those items, a Point of Entry (POE) system is recommended to treat all the water for your home/business.
| Contaminant | Levels Found |
Health Limit |
Potential Effect | Treatment |
|---|---|---|---|---|
| Alpha Emitters | 2.7 - 7 | 0pCi/L | Increased risk of cancer | Reverse Osmosis, Pureoflow |
| Arsenic | 3.53 - 4.1 | 0ppb | Skin damage or problems with circulatory systems, and may have increased risk of getting cancer | Reverse Osmosis, Pureoflow, Arsenic Filters |
| Bromodichloromethane | 0.06 - 0.3 | 0ppb | Increased risk of cancer, damage to liver, kidneys, and nervous system | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Radon | 112 - 167 | 1.5pCi/L | Increased risk of lung cancer | Reverse Osmosis, Pureoflow |
| Total Trihalomethanes | 0.52 - 1.6 | 0ppb | Liver, kidney or central nervous system problems; increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Contaminant | Levels Found |
Health Limit |
Potential Effect | Treatment |
|---|---|---|---|---|
| Chlorine | 0.5 - 2.2 | 4.0ppm | Eye/nose irritation; stomach discomfort | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Chloroform | 0.46 - 1.3 | 5.7ppb | Nervous system depression, increase in kidney and liver tumors | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Fluoride | 0.82 - 1.2 | 4.0ppm | Bone disease (pain and tenderness of the bones); children may get mottled teeth | Reverse Osmosis, Pureoflow |
| Hardness | 24 - 28gpg | NA | Increased energy consumption, damage to plumbing, appliances, fixtures, clothing, and glassware | Pureoflow, DMT Systems, Water Softener |
| Iron | 0.2 - 0.8ppm | NA | Increased energy consumption, damage to plumbing, appliances, fixtures, clothing | Pureoflow, DMT Systems |
This information was compiled from Mound's water treatment reports, the Environmental Protection Agency(EPA), Minnesota Department of Health(DOH), World Health Organization(WHO), and Environmental Working Group(EWG).
