We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Certification of Laboratories for Drinking Water

Contact Information for Certification Programs and Certified Laboratories for Drinking Water

This page provides links to non-EPA web sites that provide additional information about drinking water testing by certified laboratories. You will leave the EPA.gov domain and enter another page with more information. EPA cannot attest to the accuracy of information on that non-EPA page. Providing links to a non-EPA Web site is not an endorsement of the other site or the information it contains by EPA or any of its employees. Also, be aware that the privacy protection provided on the EPA.gov domain (see Privacy and Security Notice) may not be available at the external link. The following links exit the site Exit

On this page:

You may have your drinking water tested by contacting a laboratory certified by your state or territory.

Map of the United StatesAlabamaAlaskaAmerican SamoaArizonaArkansasCaliforniaColoradoConnecticutDelawareWashington, DCFloridaGeorgiaGuamHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachussetsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaNorthern Mariana IslandsOhioOklahomaOregonPennsylvaniaPuerto RicoRhode IslandSouth CarolinaSouth DakotaTennesseeTexasTrust TerritoriesUtahVermontVirgin IslandsVirginiaWashingtonWest VirginiaWisconsinWyoming

Top of Page


Long term 2 enhanced surface water treatment rule laboratories

Certified laboratories that analyze source water samples for Cryptosporidium in support of the Long Term 2 Enhanced Surface Water Treatment (LT2) Rule:

Top of Page


Unregulated contaminant monitoring rule laboratories

Laboratories that met the Unregulated Contaminant Monitoring Rule (UCMR) laboratory approval program application and proficiency testing criteria:

Top of Page