West Virginia Code of State Rules › Agency 64 - Health › Title 64 - LEGISLATIVE RULE WEST VIRGINIA DEPARTMENT OF HEALTH AND HUMAN RESOURCES › Series 64-04 - Public Water Systems Operators Regulations › Section 64-4-4 - Classification of Public Water Systems

Current through Register Vol. XLI, No. 28, July 12, 2024
4.1. A PWS is classified on the basis of
				source water, population, and the complexity of the water treatment processes.
4.1.1. 1D: A transient non-community PWS that
				has groundwater only as a source and does not use gaseous chlorine or chlorine
				dioxide as a means of disinfection and does not treat for the removal of
				nitrate or nitrite, or both. A groundwater source that uses gaseous chlorine,
				chlorine dioxide as a means of disinfection, or has treatment for removal of
				nitrate or nitrite, or both is at least a Class I PWS.
4.1.2. Class R: A non-transient PWS that
				retreats at the point of entry, with anything other than chlorine, another
				PWS's finished water for facility use and consumption only. A Class R that
				provides water to another PWS is at least a Class I PWS.
4.1.3. Water Distribution System (WDS): A PWS
				that obtains all of its water from another PWS and is not owned or operated by
				the supplying PWS. A WDS does not have any other source of water other than
				water from the supplying PWS. A WDS may apply chlorine for supplemental
				disinfection but otherwise does not treat its water. A WDS that retreats with
				anything other than chlorine is at least a Class I PWS.
4.1.4. Class I: A community or non-transient
				non-community PWS with a GW source that serves a population of less than
				10,000, including consecutive connection population, and does not treat for an
				identified primary contaminant. A transient non-community PWS that has a GW
				source that uses gaseous chlorine, chlorine dioxide as a means of disinfection,
				or has treatment for removal of nitrate or nitrite, or both.
4.1.5. Class II: A community or non-transient
				non-community PWS with:
4.1.5.a. A GW source
				that serves a population of less than 10,000, including consecutive
				connections, and either treats for an identified primary contaminant, or has a
				treatment technique as identified in
				40CFR
				141.73;
4.1.5.b. A GW source that serves a population
				of at least 10,000, including consecutive connections that does not treat for
				an identified primary contaminant; or,
4.1.5.c. A GUDI or SW source that serves a
				population of less than 10,000, including consecutive connections.
4.1.6. Class III: A community or
				non-transient non-community PWS with:
4.1.6.a.
				A GW source that serves a population of greater than 10,000, including
				consecutive connections, and either treats for an identified primary
				contaminant, or has a treatment technique as identified in
				40CFR
				141.73; or,
4.1.6.b. A GUDI or SW source that serves a
				population of at least 10,000, but less than 20,000, including consecutive
				connections.
4.1.7.
				Class IV: A community or non-transient non-community PWS with a GUDI or SW
				source that serves a population of at least 20,000, including consecutive
				connection population, and has treatment.