Delaware Nature Society

State of the Watersheds

The Christina Basin Watershed covers 564 square miles in Delaware, Pennsylvania, and Maryland. Comprised of the Brandywine Creek, Christina River, Red Clay Creek, and White Clay Creek sub-basins, our dedicated volunteers perform technical monitoring of water quality at thirty locations throughout the basin. They've been collecting monthly chemical data since the end of 1995.

Our data indicate that all four sub-basins are relatively consistent in temperature, pH, alkalinity and conductivity, meeting or exceeding state standards. Our greatest concerns are the low levels of dissolved oxygen we find in the summer and the relatively high levels of nutrients entering our waterways.

Using the collected data, we've prepared reports on the watershed and each of its sub-basins. We'd like to invite you to download copies to your computer and make full use of our information.

State of the Christina Basin Watershed (PDF)

State of the Brandywine Creek Watershed (PDF)

State of the Christina River Watershed (PDF)

State of the Red Clay Creek Watershed (PDF)

State of the White Clay Creek Watershed (PDF)