The Water Quality Portal (WQP) is a cooperative service sponsored by the United States Geological Survey (USGS), the Environmental Protection Agency (EPA), and the National Water Quality Monitoring Council (NWQMC). It serves data collected by over 400 state, federal, tribal, and local agencies. The MAGIC-WQP dataset is a dataset derived from the WQP and adapted to the requirements of MAGIC.

Chemicals considered by the MAGIC-WQP dataset