Updated: May 4, 2022
By Maryland Department of the Environment

Guidelines for use of Class IV Reclaimed Water: High Potential for Human Contact

Reclaimed water is wastewater from a municipal sewage treatment facility that has been treated to be suitable for beneficial use. Reclaimed water is categorized into four water quality Classes (I-IV) which govern their potential uses based on the level of treatment (or quality) attained. These guidelines apply only to use of Class IV reclaimed water generated from a centralized wastewater treatment works. Guidance on the use of Class I, II and III reclaimed water can be found in the Department’s Guidelines for Land Application/Reuse of Treated Municipal Wastewaters (MDE-WMA-001-04/10).

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