Minnetrista Water Hardness and Drinking Water Guide

Minnetrista Water Quality Background

The City of Minnetrista provides drinking water to its residents from 5 water wells. These wells range from 253 to 787 feet deep, and draw water from the Franconia-Mt. Simon and Quaternary Buried Artesian aquifers.

The city also maintains over 28 miles of water mains to deliver water to homes and businesses.

Minnetrista Water Hardness and Rust Stains

St Louis Park water hardness is rated as “extremely hard” by the USGS.  A professional-grade Water Softener or Membrane System is highly recommended to reduce hardness levels to protect plumbing, water heaters, and appliances.

You may also notice occasional rusty, red discoloration in your water. This is from Iron that is naturally occurring in most well water sources in Minnesota.

The Chlorine in city water oxidizes Iron. Oxidized iron CANNOT be removed by a Water Softener, and requires additional filtration.

Minnetrista Annual Drinking Water Quality Reports

The City of Minnetrista, MN conducts regular testing and provides annual drinking water quality reports.  These reports explain the “water contaminants” and levels that have been detected:

2012 Minnetrista Water Report
2011 Minnetrista Water Report
2010 Minnetrista Water Report
2009 Minnetrista Water Report
2008 Minnetrista Water Report
2007 Minnetrista Water Report
2006 Minnetrista Water Report

The EPA has established two standards for additional contaminants in tap water:

MCL: Maximum Contaminant Level – The maximum allowable level of a certain contaminant, aka the “Legal Limit”
MCLG: Maximum Contaminant Level GOAL – The level where studies have found ZERO HEALTH RISKS, aka the “Health Limit”

All water contaminants meet the EPA’s “Legal Limit”.  Certain water contaminants exceed the EPA’s Health Limit and have been highlighted:

Inorganic Contaminants

Inorganic contaminants include salts and metals like Hard Water and Copper. Inorganic contaminants are mostly consumed through drinking water, and most do not easily pass through skin. Carbon Filters (refrigerator and faucet filters) have virtually ZERO impact on these contaminants. Reverse Osmosis and the LINX Evolution are very effective at removing inorganic contaminants.

Contaminant Levels Found Health Limit Legal Limit Potential Effects
Arsenic 1.57 – 2.56 0 10ppb Skin damage or problems w/ circulatory systems, increased risk of cancer
Barium 0.11 – 0.27 2 2ppm Increase in blood pressure
Fluoride 0.88 – 2.3 4 4ppm Bone disease (pain and tenderness of the bones); children may get mottled teeth
Hard Water 24gpg NA NA Damage to plumbing, appliances, glassware
Iron 0.1 – 1.0ppm NA NA Damage to plumbing, appliances, water heaters, laundry
Sodium 30 – 32ppm NA NA Hypertension
Sulfates 81 – 123ppm NA NA Catharsis, Dehydration from diarrhea

Disinfectants and Disinfection Byproducts

Disinfectants are added to control bacteria.   When disinfectants like Chlorine react with other water contaminants, a new class of compounds are formed called “Disinfection Byproducts.  Many of these chemicals can enter the body through inhalation, absorption through skin, and through drinking water.  A Whole House Carbon Filter is a good preventative tool in addition to a Drinking Water System for these compounds as well.

Contaminant Levels Found Health Limit Legal Limit Potential Effects
Bromodichloromethane 0.35 – 1.40 0 80ppb Increased risk of cancer, damage to liver, kidneys, and nervous system
Chlorine 0.76 – 2.3 4 4ppm Eye/nose irritation; stomach discomfort
Dibromochloromethane 0.15 – 0.60 0.4 80ppb Increased risk of cancer
Haloacetic Acids 3.2 NA 60ppb Increased risk of cancer
Trihalomethanes 0.8 – 5.3 NA 80ppb Liver, kidney or central nervous system problems; increased risk of cancer


Radionuclides may occur naturally, or be the result of oil and gas production or mining activities. These can be inhaled, or consumed through drinking water.

Contaminant Levels Found Health Limit Legal Limit Potential Effects
Alpha Emitters 4.1 – 18.0 0 15.4pCi/L Increased risk of cancer
Combined Radium 1.3 – 4.0 0 5pCi/L Increased risk of cancer

This information was compiled from Minnetrista’s water treatment reports, the Environmental Protection Agency(EPA), Minnesota Department of Health(DOH), World Health Organization(WHO), and Environmental Working Group(EWG).