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The City of Cologne serves water to over 1,200 people. Cologne’s water hardness ranges from 28-30 grains which is almost 6x harder than the national average. The high level of total dissolved solids (TDS) and organic matter also contribute to a poor overall taste.
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 |
|---|---|---|---|---|
| Arsenic | 7.83 | 0ppb | Skin damage or problems with circulatory systems, and may have increased risk of getting cancer | Reverse Osmosis, Pureoflow, Arsenic Filters |
| Bromodichloromethane | 0.27 - 0.6 | 0ppb | Increased risk of cancer, damage to liver, kidneys, and nervous system | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Combined Radium | 1.1 - 4.1 | 0pCi/L | Increased risk of cancer | Reverse Osmosis, Pureoflow |
| Dibromochloromethane | 2.43 - 6.9 | 0.4ppb | Increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Dichloroacetic acid | 3.9 - 6.6 | 0ppb | Irritant and corrosive to the eyes, skin and respiratory tract | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Radon | 486 - 509 | 1.5pCi/L | Increased risk of lung cancer | Reverse Osmosis, Pureoflow |
| Total Trihalomethanes | 1.43 - 3.4 | 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 | 0.357 | 2ppb | Increase in blood pressure | Reverse Osmosis, Pureoflow |
| Chloroform | 1.17 - 2.8 | 5.7ppb | Nervous system depression, increase in kidney and liver tumors | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Hardness | 28 - 30gpg | NA | Increased energy consumption, damage to plumbing, appliances, fixtures, clothing, and glassware | Pureoflow, DMT Systems, Water Softener |
| Monochloroacetic acid | 0.95 - 3.2 | 70ppm | Increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
| Trichloroacetic acid | 0.53 - 0.9 | 20ppm | Increased risk of cancer | Reverse Osmosis, Pureoflow, DMT Systems, Carbon Filters |
This information was compiled from Cologne's water treatment reports, the Environmental Protection Agency(EPA), Minnesota Department of Health(DOH), World Health Organization(WHO), and Environmental Working Group(EWG).
