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More Information

How to Understand Water Test Results for Household Wells       How to interpret the results of a well water test WELL WATER CONTAMINATION: CAUSES, CURES - home WATER POLLUTANT SOURCES WATER WELL CONTAMINATION HAZARDS WATER WELL PROTECTION & RESTORATION SIX STEPS to WATER WELL SAFETY & SANITATION 1. How To Spot Well Contamination Problems 2. Well Water Test Strategy & Reasons 3. How to Understand Water Test Results 4. Well Construction and Maintenance 5. Talk With Local Water Experts 6. Fix Well Water Contamination Problems WELL CONSTRUCTION INFORMATION SOURCES WELL & WELL WATER DEFINITIONS EPA GUIDE to WATER QUALITY - annotated,illustrated & expanded guide to Ground water & Well Contamination Questions & Answers about how to correct contaminated or polluted (unsanitary) well water References

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Well water test results: how to read & understand you well water test report.

Green links show where you are. © Copyright 2013 InspectAPedia.com, All Rights Reserved. Author Daniel Friedman.

A Quick EPA Guide to Understanding Your Water Test Results

Have your well water tested for any possible contaminants in your area. Use a state-approved testing lab. (See below for sources of approved laboratories.) Do not be surprised if a lot of substances are found and reported to you.

The amount of risk from a drinking water contaminant depends on the specific substance and the amount in the water. The health of the person also matters.

Some contaminant cause immediate and severe effects. It may take only one bacterium or virus to make a weak person sick.

Another person may not be affected. For very young children, taking in high levels of nitrate over a relatively short period of time can be very dangerous.

Many other contaminants pose a long-term or chronic threat to your health - a little bit consumed regularly over a long time could cause health problems such as trouble having children and other effects.

EPA drinking water rules for public water systems aim to protect people from both short and long term health hazards. The amounts of contaminants allowed are based on protecting people over a lifetime of drinking water. Public water systems are required to test their water regularly before delivery.

They also treat it so that it meets drinking water standards, notify customers if water does not meet standards and provide annual water quality reports.

Compare your well's test results to federal and state drinking water standards. (You can find these standards at www.epa.gov/safewater/mcl.html or call the Safe Drinking Water Hotline 800-426-4791.) In some cases, the laboratory will give a very helpful explanation. But you may have to rely on other experts to aid you in understanding the results.

More details about how to read & interpret a water test result

See this non-EPA document which offers much more detail:
Interpreting Drinking Water Test Results and Correcting Unsatisfactory Drinking Water, - not an EPA site

also see
WATER CONTAMINANT LEVELS
Table of Allowable Water Contaminant Limits

• The state agency that licenses water-well contractors can help you understand your test results. It will also provide information on well construction and protection of your water supply. The agency is usually located in the state capital or other major city. It is often part of the department of health or environmental protection. Check the blue "government pages" of your local phone book or call the American Ground Water Trust at (614) 761- 2215 or the EPA Hotline at (800) 426-4791 for your licensing agency's phone number.
• The local health department and agricultural agents can help you understand the test results. They will have information on any known threats to drinking water in your area. They can also give you suggestions about how to protect your well water.
• The state drinking water program can also help. You can compare your well's water to the state's standards for public water systems. State programs are usually located in the state capital or another major city. They are often part of the department of health or environmental regulation. Again, consult the blue "government pages" in your local phone book for the address and phone number or call or the EPA Hotline - (800) 426-4791.
• The Safe Drinking Water Hotline at (800) 426-4791, mentioned above - can help in many ways. The Hotline can provide a listing of contaminants public water systems must test for. EPA also has copies of health advisories prepared for specific drinking water contaminants. The EPA Hotline staff can explain the federal regulations that apply to public water systems. They compare your lab results to the federal standards. In addition, they can give you the phone number and address of your state drinking water program, and of your state laboratory certification officer. That officer can send you a list of approved labs in your area.

This article on water contaminants describes types of activities in your area that can create threats to your water supply. It also describes problems to look for and offers maintenance suggestions. Sources for more information and help are also listed. [Editing for clarity by DF are marked by brackets or italics] Initial Source: EPA 816-K-02-003 January 2002

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Technical Reviewers & References

Related Topics, found near the top of this page suggest articles closely related to this one.

• [1] Drinking Water from Household Wells - PDF, U.S. EPA, Original source last retrieved 2/13/2013, original source: http://www.epa.gov/privatewells/pdfs/household_wells.pdf
• Cheating on water tests: Testing Water for Real Estate Transactions - make sure your water test is valid
• Drinking Water Contaminant Levels - Maximum Allowed
• Drinking Water Supply, Contamination Levels, Water Testing Procedures
• Drinking Water Testing Advice for home buyers home owners home inspectors
• Interpreting Drinking Water Test Results and Correcting Unsatisfactory Water
• Lead Contamination in Drinking Water: Testing & Correction - Advice
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Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair

• Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. Also see our Book Reviews - InspectAPedia.

The Home Reference Book - the Encyclopedia of Homes, Carson Dunlop & Associates, Toronto, Ontario, 25th Ed., 2012, is a bound volume of more than 450 illustrated pages that assist home inspectors and home owners in the inspection and detection of problems on buildings. The text is intended as a reference guide to help building owners operate and maintain their home effectively. Field inspection worksheets are included at the back of the volume. Special Offer: For a 10% discount on any number of copies of the Home Reference Book purchased as a single order. Enter INSPECTAHRB in the order payment page "Promo/Redemption" space. InspectAPedia.com editor Daniel Friedman is a contributing author. Or choose the The Home Reference eBook for PCs, Macs, Kindle, iPad, iPhone, or Android Smart Phones. Special Offer: For a 5% discount on any number of copies of the Home Reference eBook purchased as a single order. Enter INSPECTAEHRB in the order payment page "Promo/Redemption" space.

Building inspection education & report writing systems from Carson, Dunlop & Associates Ltd

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