Table of Drinking Water Contaminant Levels
What Are the
Maximum Acceptable Levels of Contaminants in Drinking Water?
WATER CONTAMINANT LEVELS & LIMITS - CONTENTS: Allowable limits of water contaminants in drinking water. What are the action levels for different contaminants found in drinking water? New York State example of maximum level of water contaminants allowed.
While the table of water contamination ingredients and allowable levels is from New York State, these limits
or similar numbers will apply in most jurisdictions. Water contamination limits and testing requirements in the U.S. are regulated by the
Federal Clean Drinking Water act.
Subpart 5-1 of the New York State Sanitary Code defines "Maximum Water Contaminant Level' as the permissible level of a
contaminant in water which is delivered to any user of a public water system. New York State does not regulate private
drinking water supplies (single family homes on well water).
Most lenders require at least a confirmation of "potable"
water meaning that bacteria count and coliform bacteria count is less than 1 CFU per 100 ml. of drinking water
in the water test sample. Some lenders require water passing the FHA
"Short" or FHA "Long" test list items. Readers of this article should also see
Drinking Water Supply, Contamination Levels, Water Testing Procedures.
Table of Acceptable Limits on Common Drinking Water Contaminants
Analyte / Contaminant
Pt Co units(d)
designated limits (c)
Colony /100 ml
Colony /100 ml
Notes about drinking water contaminant acceptable levels
(a) mg/L = milligrams per liter
(b) If iron and manganese are present, the total concentration of both should not exceed 0.5 mg/L.
(d) Color test result expressed as Platinum Cobalt Color Units
(e) Odor test result expressed as Threshold Odor Number
(f) If nitrate and nitrite are present, the total concentration of both should not exceed 10 mg/L.
(g) "Action level" is the concentration of lead or copper (in a sample of water drawn from a tap normally used for drinking after a 6-hour period of no water use) that, when exceeded, triggers actions to be taken by a water system.
(h) FHA "Short List" items
(i) FHA "Long List" items - (indications to be added after lab review)
Watch out: also see WATER TESTING ADVICE for home buyers
and building owners: water contaminants, water test procedures, well shock procedures, preventing drinking water
contamination, and CHEATING ON WATER TESTS that warns about how people accidentally or on purpose can obtain incorrect water test results.
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Please help! I am stumped, how am i getting good readings at my well when im not adding any chlorine and still getting good readings through out all my mobile home rentals? - Smitty Smith 6/28/12
What kind of good readings at your well?
If you mean a bacteria test that is not showing any bacterial contamiantion, if the current water coming into your system is not contaminated with bacteria it won't show up, chlorine or not.
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Handbook of Disinfectants and Antiseptics, Joseph M. Ascenzi (Editor), CRC, 1995, ISBN-10: 0824795245 ISBN-13: 978-0824795245 "The evaluation of chemical germicides predates the golden age of microbiology..." -
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New England Journal of Medicine: City Hospital, Birmingham, UK. Covers the many methods of the elimination or prevention of microbial growth. Provides an historical overview, descriptions of the types of antimicrobial agents, factors affecting efficacy, evaluation methods, and types of resistance. Features sterilization methods, and more. Previous edition: c1999. DNLM: Sterilization--methods.
U.S. Army Field Manual 21-10, Field Hygiene and Sanitation, 1988, web search 07/02/2010, original source: http://www.enlisted.info/field-manuals/fm-21-10-field-hygiene-and-sanitation.shtml The purpose of this manual is to assist individual soldiers, unit commanders, leaders and field sanitation teams in preventing disease and environmental injuries. The manual provides information on preventive medicine measures (PMM) to the individual soldier as well as essential information for the unit commander, unit leaders, and the unit field sanitation team on applying unit level PMM.
When Technology Fails, Matthew Stein, Chelsea Green Publisher, 2008,493 pages. ISBN-10: 1933392452 ISBN-13: 978-1933392455, "... how to find and sterilize water in the face of utility failure, as well as practical information for dealing with water-quality issues even when the public tap water is still flowing". Mr. Stein's website is www.whentechfails.com/
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