Home Water Testing Services

Water Treatment Solutions

Having clean water available in your home should be a top priority, but how do you really know what is in your water? Wisconsin has several resources for water supply, so no two areas have the same makeup of water. The experts at Guthrie & Frey offer home water testing and hardness testing services for Southeastern Wisconsin homes.

These testing services are designed to detect harmful arsenic levels and other contaminants. Once the water is tested, we’ll recommend the best solution for clean drinking water for your home.

Point of Entry

These systems are designed to reduce arsenic levels to below 10 ppb for all water within the home (excludes irrigation). The 2 main types of treatment are those that involve chlorination and oxidation and those that utilize absorptive medias. After testing your water, we’ll select the best option for your home based on your area and what is in your water following the water test. At present, an absorptive media application would require state approval for each application. In cases where the well serves the public, the equipment recommendations will require DNR approval.

Point of Use

These systems are designed to reduce arsenic to levels below 10 ppb to a few points of use only (i.e. faucet at the kitchen sink and refrigerator). Depending on the quantity and type of arsenic based on the water test, a traditional reverse osmosis system may already be approved for this application. These systems are relatively inexpensive and can be purchased or rented. If the arsenic makeup has not been speciated and/or the majority is in a trivalent form, a more elaborate, state approved RO system would be recommended. These systems employ a chlorination step. The less expensive chlorine feed option is a simpler design that requires a less precise method of chlorine introduction. All the RO systems would require routine maintenance (depending on the system and the level of service it requires).

Much of the above listed information is from the Wisconsin department of Natural Resources form PUB-DG-062.

Arsenic Testing

You cannot taste, smell or see arsenic. Testing is the only way to identify arsenic in drinking water. The current standard is a maximum contaminant level of 10 ppb. Arsenic levels below 100 ppb are typically considered safe to bathe in. Depending on the lab, total arsenic tests can now be turned around in approximately 7 business days beginning from the date the lab receives the sample. Get more info on Arsenic Water Treatment.

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3 Types of Water Testing

  • On-site water testing
  • Off-site water testing
  • Water safety testing
  • For all real-estate transactions, private wells need to do all 3 of these tests

The Threats of Drinking Contaminated Water

ContaminantEPA MCL (mg/L)Potential Health effects from exposure above the MCLCommon sources of contaminate in drinking water
Total Coliform (includes fecal coliform & E. coli)zero presenceIndicate whether potentially harmful bacteria may be present.Coliforms are naturally present in the environment.
Nitrates, Total10Infants below the age of six months who drink water containing nitrate in excess of the MCL could become seriously ill and, if untreated, may die. Symptoms include shortness of breath and blue-baby syndrome.Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits.
Arsenic0.010Skin damage or problems with circulatory systems, and may have increased risk of getting cancer.Erosion of natural deposits; runoff from orchards, runoff from glass and electronics production waste.
LeadAction Level = 0.015Infants and children: Delays in physical or mental development; children could show slight deficits in attention span and learning abilities; Adults: Kidney problems; high blood pressure.Corrosion of household plumbing systems; erosion of natural deposits.

Arsenic/Nitrate Testing Requirements

As of 10/1/14, all real estate transactions on a private well that require a well inspection will require that the water be tested for bacteria, nitrates and total arsenic.

The DNR has stated that “due to the chemical nature of arsenic in ground water, it must be recognized by all that arsenic levels can change with time. There is no such thing as an iron clad clean bill of health”.

On-site Water Testing

• Hardness of your water
• Iron levels
• TDS (Total Dissolved Solids)

On-site water testing involves a quick water analysis performed on your property itself. These tests check pH, TDS and ORP (Oxidation-Reduction Potential) levels to get a snapshot of water quality.

Off-site Testing Services

Off-site water testing involves taking a sample of your water to a laboratory for in depth-inspections. Guthrie & Frey will collect and deliver the sample to the laboratory and communicate the water test results to you along with professional recommendations on correcting your water.

Safety Test

• Bacteria chloroform test
• Results will display “Safe” or “Unsafe” and a corrective action plan will be put into place.

Coliform bacteria is a group of microorganisms found in plants, soil, and surface water. The bacteria can seep through cracked or poorly sealed wells and contaminate your drinking water causing a range of health hazards. Our safety test system will let you know whether your water is safe to drink.

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What is arsenic?


Arsenic is an element that occurs naturally in soil and bedrock. Traces of arsenic can also be found in groundwater, lakes, rivers and ocean water. Some foods can also contain levels of the organic (non-toxic) form of arsenic.

High levels of inorganic arsenic, the more toxic form, have been found in over 1,200 private wells in Wisconsin. Except for Milwaukee county, arsenic levels in excess of 10 ppb have been found in all other counties in SE Wisconsin.


What are the sources of arsenic?


Since arsenic is a natural part of the environment, everyone is exposed to small amounts. The major source of arsenic exposure is drinking water that contains elevated levels of arsenic. Arsenic can be easily absorbed by drinking contaminated water or by breathing airborne particulates. Arsenic is not easily absorbed through the skin and does not evaporate from the water into air.


How does arsenic get in to the drinking water?


Arsenic is a natural occurrence but can be harmful if in its toxic state. Most of the arsenic found in Wisconsin groundwater is naturally occurring, deposited in the soil and bedrock over millions of years. Increased demand on the aquifer is believed to have exposed new areas of bedrock to oxygen resulting in chemical reactions that can release arsenic into the water.


What are the affects of arsenic on human health?


The consumption of drinking water contaminated with arsenic has been associated with the following possible health effects: unusual skin pigmentation, numbness of hands/feet, circulatory disorders, tremors, various cancers, nausea, diarrhea, diabetes, and depression.

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