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The City of Prior Lake currently operates five wells and plans to add a sixth well in 2010 to meet the demands of The City’s growing population.
Four of the existing wells are between 345 and 372 feet deep and tap into the Jordan aquifer, while the fifth draws from the Franconia-Ironton-Galesville (FIG) aquifer which is 630 feet below ground. The city's water supply system is capable of producing well over 8 million gallons per day.
Periodic brown colored water is common in Prior Lake water, and is caused by a higher than normal level of manganese. Manganese will cause brown stains in dishes, clothing, tubs, fixtures, and appliances. The city does offer a free cleaning agent to help remove these stains.
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.
2010 Prior Lake Water Report
2009 Prior Lake Water Report
2008 Prior Lake Water Report
2007 Prior Lake Water Report
| Contaminant | Levels Found |
Health Limit |
Potential Effect | Treatment |
|---|---|---|---|---|
| Alpha Emitters | 4.6 - 5.87 | 0pCi/L | Increased risk of cancer | Reverse Osmosis, Pureoflow |
| Arsenic | 4.62 - 8.11 | 0ppb | Skin damage or problems with circulatory systems, and may have increased risk of getting cancer | Reverse Osmosis, Pureoflow, Arsenic Filters |
| Bromodichloromethane | 1.47 - 4.8 | 0ppb | Increased risk of cancer, damage to liver, kidneys, and nervous system | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Chloroform | 2.96 - 15 | 5.7ppb | Nervous system depression, increase in kidney and liver tumors | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Combined Radium | 2.8 - 6.1 | 0pCi/L | Increased risk of cancer | Reverse Osmosis, Pureoflow |
| Dibromochloromethane | 0.61 - 2 | 0.4ppb | Increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Dichloroacetic acid | 1.33 - 4 | 0ppb | Irritant and corrosive to the eyes, skin and respiratory tract | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Haloacetic Acids | 3.3 - 3.4 | 0ppb | Increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Manganese | 74ppb | 50ppb | Black staining, increased energy consumption, damage to plumbing, appliances, fixtures, clothing, decreased IQ in children | Pureoflow, DMT Systems |
| Radon | 303 - 719 | 1.5pCi/L | Increased risk of lung cancer | Reverse Osmosis, Pureoflow |
| Total Trihalomethanes | 11.4 - 20.4 | 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 |
|---|---|---|---|---|
| Barium | 0.03 - 0.37 | 2ppb | Increase in blood pressure | Reverse Osmosis, Pureoflow |
| Chlorine | 0.83 - 1.72 | 4.0ppm | Eye/nose irritation; stomach discomfort | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Chromium | 20 | 100ppb | Allergic dermatitis | Reverse Osmosis, Pureoflow |
| Cyanide | 190 | 200ppb | Nerve damage or thyroid problems | Reverse Osmosis, Pureoflow |
| Ethylbenzene | 0.12 - 0.8 | 700ppb | Drowsiness, fatigue, headache, mild eye and respiratory irritation, damage to the liver, kidneys, central nervous system | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Fluoride | 1.0 - 1.4 | 4.0ppm | Bone disease (pain and tenderness of the bones); children may get mottled teeth | Reverse Osmosis, Pureoflow |
| Hardness | 19 - 21gpg | NA | Increased energy consumption, damage to plumbing, appliances, fixtures, clothing, and glassware | Pureoflow, DMT Systems, Water Softener |
| Mercury | 0.27 | 2ppb | Kidney damage | Reverse Osmosis, Pureoflow |
| Monochloroacetic acid | 1.69 - 1.70 | 70ppm | Increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Nickel | 10.7 | 100ppb | Increased risk of cancer from inhalation | Pureoflow |
| Sodium | 8.4ppm | NA | Hypertension | Pureoflow, DMT Systems |
| Sulfate | 19 - 30.2ppm | NA | Catharsis, Dehydration from diarrhoea | Pureoflow, DMT Systems |
| Toluene | 0.6 - 6.6ppb | 150ppb | Nervous system, kidney, or liver problems | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Trichloroacetic acid | 1.84 - 3.0 | 20ppm | Increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Xylenes | .02 - 0.059 | 10ppm | Nervous system damage | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
This information was compiled from Prior Lake's water treatment reports, the Environmental Protection Agency(EPA), Minnesota Department of Health(DOH), World Health Organization(WHO), and Environmental Working Group(EWG).
