Laboratory Proficiency Testing

New York State Department of Health Potable and Non Potable Water Studies

All results in pdf format.

Non Potable Water Studies:

All non potable analyses performed by USGS methods.

Potable Water Studies:

Branch of Quality Assurance (BQS) Studies

Note: The NWQL is Lab 1 in all BQS studies.

Environment Canada Proficiency Testing Studies

For inquiries contact: Lisa Bressler (lbressle@usgs.gov)