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State of New Jersey Department of Environmental Protection
State of New Jersey Department of Environmental Protection
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In March 2001, the New Jersey Private Well Testing Act (PWTA) was signed into law, and its regulations became effective in September 2002. The PWTA is a consumer information law that requires sellers (or buyers) of property with potable wells in NJ to test the untreated ground water for a variety of water quality parameters, including up to 32 of human health concern, and to review the test results prior to closing of title. Landlords are also required to test their well water once every five years and to provide each tenant with a copy of the test results. The test data is submitted electronically by the test laboratories to the NJ Department of Environmental Protection for retention, notifying health department of water quality issues, and statewide analysis of ground water quality.

Approximately 20 to 25% of the wells in the State have been tested under this program. Several maps were created from some of the PWTA data. These maps are intended to provide information to homeowners about potential risks in their municipalities. Homeowners with private wells are encourage to test their wells for bacteria, nitrates and other contaminants that have been found to be problems in their municipalities.

NJDEP regulates the construction of private wells. A newly constructed well is tested once for the presence of the contaminants regulated under the Safe Drinking Water Act. Post construction regulation of private wells is the responsibility of individual counties or other local agencies.

For more information on the Private Well Testing Act please go to


Additional Information
The Department, in collaboration with Barnard College, Lamont-Doherty Earth Observatory and others, has developed a series of arsenic-related educational videos. The videos provide arsenic awareness for adults and children and information on testing your well water. Watch the videos here.

Division of Science, Research and Environmental Health
Dr. Gary A. Buchanan, Director
Mailing Address:
Mail code 428-01, P.O. Box 420
Trenton, NJ 0862

Phone: (609) 984-6070
Fax: (609) 292-7340

For Information regarding this site, please contact Terri Tucker.

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Last Updated: August 11, 2015