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The City of Maple Grove draws water from 12 wells ranging from 157 to 715 feet deep, which get water from the Franconia-Mt. Simon aquifer, the Quaternary Water Table aquifer, and the Mt. Simon aquifer.
Maple Grove’s raw water contains excessive amounts of iron and manganese. Without removal, this combination of minerals will cause rusty, brownish-red water, spotting of clothes, staining of sinks, tubs and toilets, and foul taste and odor.
In 1987 Maple Grove installed a water treatment plant that injects chlorine and potassium permanganate into the water to oxidize these minerals, and then remove them with filter beds of specially coated silica sand. Chlorine and fluoride are added last to two storage tanks that hold 3.5 million gallons of water.
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.
2009 Maple Grove Water Report
2008 Maple Grove Water Report
2006 Maple Grove Water Report
2005 Maple Grove Water Report
| Contaminant | Levels Found |
Health Limit |
Potential Effect | Treatment |
|---|---|---|---|---|
| Alpha Emitters | 15 | 0pCi/L | Increased risk of cancer | Reverse Osmosis, Pureoflow |
| Bromodichloromethane | 3.89 - 6.4 | 0ppb | Increased risk of cancer, damage to liver, kidneys, and nervous system | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Bromoform | 2.4 - 7.7 | 0ppb | Increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Combined Radium | 10.4 | 0pCi/L | Increased risk of cancer | Reverse Osmosis, Pureoflow |
| Dibromochloromethane | 4.45 - 11 | 0.4ppb | Increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Dichloroacetic acid | 0.47 - 1.7 | 0ppb | Irritant and corrosive to the eyes, skin and respiratory tract | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Fecal Coliform and E. Coli Bacteria | 1% | 0% | Short term effects, such as diarrhea, cramps, nausea, headaches, or other symptoms. They may pose a special health risk for infants, young children, and people with severely compromised immune systems. | Pureoflow, Ultrafiltration |
| Haloacetic Acids | 1.4 - 5.1 | 0ppb | Increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Radon | 43 - 408 | 1.5pCi/L | Increased risk of lung cancer | Reverse Osmosis, Pureoflow |
| Tetrachloroethylene | 0.4 - 0.5 | 0ppb | Liver problems; increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Total Coliform Bacteria | 1% | 0% | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present | Pureoflow, Ultrafiltration |
| Total Trihalomethanes | 12.7 - 28.0 | 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 | 0.11 - 0.12 | 2ppb | Increase in blood pressure | Reverse Osmosis, Pureoflow |
| Chlorine | 0.47 - 1.3 | 4.0ppm | Eye/nose irritation; stomach discomfort | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Chloroform | 2.01 - 3.7 | 5.7ppb | Nervous system depression, increase in kidney and liver tumors | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Dibromoacetic acid | 1.56 - 2.40 | 60ppb | Increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Ethylbenzene | 0.35 - 0.70 | 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 | 0.79 - 1.2 | 4.0ppm | Bone disease (pain and tenderness of the bones); children may get mottled teeth | Reverse Osmosis, Pureoflow |
| Hardness | 22 - 25gpg | NA | Increased energy consumption, damage to plumbing, appliances, fixtures, clothing, and glassware | Pureoflow, DMT Systems, Water Softener |
| Iron | 0.2ppm | NA | Increased energy consumption, damage to plumbing, appliances, fixtures, clothing | Pureoflow, DMT Systems |
| Manganese | 30ppb | 50ppb | Black staining, increased energy consumption, damage to plumbing, appliances, fixtures, clothing, decreased IQ in children | Pureoflow, DMT Systems |
| Methyl isobutyl ketone | 2.75 - 5.5 | NA | Nausea, headache, burning in the eyes, weakness, insomnia, intestinal pain, and slight enlargement of the liver | Pureoflow, DMT Systems, Water Softener |
| Monochloroacetic acid | 1.18 - 5.1 | 70ppm | Increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Nitrates | 0.06 - 0.1 | 10ppm | Infants below the age of six months could become seriously ill and, if untreated, may die. Symptoms include shortness of breath and "blue baby" syndrome. | Reverse Osmosis, Pureoflow |
| Sodium | 12.0 - 19.0ppm | NA | Hypertension | Pureoflow, DMT Systems |
| Sulfates | 43.1 - 48.0ppm | NA | Catharsis, Dehydration from diarrhoea | Pureoflow, DMT Systems |
| Toluene | 0.9 - 1.8 | 150ppb | Nervous system, kidney, or liver problems | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Trichloroacetic acid | 0.33 - 1.0 | 20ppm | Increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Xylenes | .40 - 0.80 | 1,800ppb | Nervous system damage | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
This information was compiled from Maple Grove's water treatment reports, the Environmental Protection Agency(EPA), Minnesota Department of Health(DOH), World Health Organization(WHO), and Environmental Working Group(EWG).
