Publications Home || Browse by topic || Browse by program || Ecology website

Publication Summary

Our Ecology website has changed, which can cause broken links.
To report these, please contact us with the publication and broken link.


Nitrogen Dynamics at a Manured Grass Field Overlying the Sumas-Blaine Aquifer in Whatcom County

Publication number Date Published
14-03-001March 2014
VIEW NOW Nitrogen Dynamics at a Manured Grass Field Overlying the Sumas-Blaine Aquifer in Whatcom County (Number of pages: 150) (Publication Size: 18585KB)

Win Zip format (Publication Size: 147KB)
Note: Tables J.2 and J.3 in Appendix J

Appendices B through T
(110 pages) (7MB)

Response to Comments
(91 pages) (3MB)

Trouble viewing? Try these free options.
Author(s) Carey, B. (Ecology) and J. Harrison (WSU)
Description The Department of Ecology, in cooperation with Washington State University, conducted a 4-1/2-year monitoring study at a manured grass field overlying the Sumas-Blaine Aquifer in northwest Washington. The purpose of the study was to evaluate nitrogen dynamics at a manured field relative to documented high nitrate concentrations across the aquifer.

The amount and timing of manure application were the overriding factors that affected groundwater nitrate concentrations in shallow monitoring wells in the study field.

Nitrogen mass balance analysis and post-harvest soil nitrate results were not reliable predictors of nitrate concentrations in groundwater. Direct monitoring of water quality at the water table was the only accurate and reliable method for tracking effects of manure management on groundwater nitrate.

Appendices B through T are linked under View Now above. The Response to Comments is also linked above.
The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.

ADA Accessibility
The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188.
Visit Ecology’s website for more information.
Contact Barbara Carey at 360-407-6769 or
Keywords Sumas-Blaine, HUC number, nitrogen, manure, groundwater, aquifer
WEB PAGE Sumas-Blaine surficial aquifer long-term ambient groundwater monitoring
WATERSHED Water Resource Inventory Area 01 Nooksack
DATA Environmental Information Management (EIM) #bcar0003


POSTER: Evaluation of field N budgets and soil nitrate as indicators of N leaching to groundwater in a Pacific Northwest U.S. dairy grass field

Focus on Groundwater Quality: Study evaluates nitrogen at a manured grass field

Sumas-Blaine Aquifer Nitrate Contamination Summary

Quality Assurance Project Plan: Groundwater, Soil, and Crop Nitrogen at a Field Where Dairy Waste is Used as Fertilizer in Whatcom County.