If your drinking water comes from a private well, you are responsible for testing. The NJDEP recommends that you use a laboratory that is NJDEP-certified. You can call the NJDEP Office of Quality Assurance at (609) 292-3950 for information on laboratories certified to test drinking water or look for the information online at: [https://www13.state.nj.us/DataMiner] using the "Search by Category" option, select "Certified Laboratories", and search for "Certified Drinking Water Labs", "PWTA Laboratories Certified for Sampling", or "Laboratories Certified by Parameter". Testing is required for sale of residential real estate when a private well is the source of drinking water. For more information, contact the NJDEP Private Well Testing Program at (866) 479-8378 or visit: [http://www.nj.gov/dep/watersupply/pw_pwta.html] Private Well Testing Act Frequently Asked Questions: [http://www.nj.gov/dep/watersupply/pwta/pwta_faq.htm] NJ Private Well Testing Act Data Summary, by county, municipality, and 2 mile by 2 mile grid: [http://arcg.is/1CPkHyC] NJDOH Drinking Water Facts: Private Wells, [http://www.nj.gov/health/ceohs/documents/eohap/pw_faq.pdf ] NJDOH Drinking Water and Public Health Project, [http://www.nj.gov/health/ceohs/sanitation-safety/drinking-water-public-health/]