A Plain English Guide to the EPA Part 503 Biosolids Rule
The U.S. Environmental Protection Agency’s A Plain English Guide to the EPA Part 503 Biosolids Rule summarizes 40 CFR Part 503. While the guide is not a substitute for the actual rule, it is consistent with the content of the Part 503 rule and can be a helpful tool. The guide has not been updated to include amendments to 40 CFR Part 503 that occurred after 1994.