A Homeowners Guide to Septic Systems, United States Environmental Protection Agency, EPA-832-B-02-005. 15 p; Revised March 2005.
Homeowners Guide to Onsite Sewage Systems, Kitsap Public Health District, 24 p.
Small Farm Composting Guide, USDA Natural Resources Conservation Service, Lynden Field Office. 24 p.
Horses for Clean Water, Whatcom Conservation District, 76 p, 2003.
Scoop the Poop, Bag it, Place it in the Trash, Suzi Wong Swint, 36 p. Snohomish Surface Water Management, May 2014.
Backyard Composting, Craig Cogger and Dan Sullivan, 7 p, WSU Extension, PUB EB1784E
Microplastics in Consumer Products and the Marine Environment, 10 p, 5 Gyres Institute, 2013.