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 Virginia Administrative Code (Last Updated: January 10, 2017)
 Title 18. Professional and Occupational Licensing
 Agency 160. Board for Waterworks and Wastewater Works Operators and Onsite Sewage System Professionals
 Chapter 20. Board for Waterworks and Wastewater Works Operators and Onsite Sewage Systemprofessionals Regulations

  Section 120. Waterworks  

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  • Part IV. Classification Requirements

    A. A Class 6 waterworks licensee may operate any waterworks as follows:

    1. A waterworks providing no treatment and serving fewer than 400 persons; or

    2. A waterworks classified by the Virginia Department of Health as a Class 6 waterworks.

    B. A Class 5 waterworks licensee may operate any waterworks as follows:

    1. A waterworks serving 400 or more persons which (i) provides no treatment or (ii) employs hypochlorination for disinfection; or

    2. A waterworks classified by the Virginia Department of Health as either a Class 5 or Class 6 waterworks.

    C. A Class 4 waterworks licensee may operate any waterworks as follows:

    1. A waterworks serving fewer than 5,000 persons or having a design hydraulic capacity of less than 0.5 MGD, employing one or more of the following (i) disinfection other than with hypochlorination, (ii) corrosion control, (iii) iron and manganese removal, (iv) ion exchange, (v) membrane technology without pretreatment, (vi) slow sand filtration, (vii) aeration, (viii) rechlorination other than with hypochlorination, or (ix) activated carbon contactors; or

    2. A waterworks classified by the Virginia Department of Health as a Class 4, 5, or 6 waterworks.

    D. A Class 3 waterworks licensee may operate any waterworks as follows:

    1. A waterworks serving fewer than 5,000 persons or having a design capacity less than 0.5 MGD, employing chemical coagulation or lime softening in combination with one or more of the following (i) sedimentation, (ii) rapid sand filtration with a filtration rate of 2 gpm/square foot or less, (iii) fluoridation, (iv) disinfection, (v) aeration, (vi) corrosion control, or (vii) membrane technologies;

    2. A waterworks serving 5,000 or more persons or having a design hydraulic capacity of 0.5 MGD, employing one or more of the following; (i) disinfection other than with hypochlorination, (ii) corrosion control, (iii) iron and manganese removal, (iv) ion exchange, (v) membrane technology without pretreatment, (vi) slow sand filtration, (vii) aeration, (viii) rechlorination other than with hypochlorination, or (ix) activated carbon contactors;

    3. A waterworks employing (i) membrane technology requiring pretreatment consisting of pH adjustment; or (ii) diatomaceous earth filtration, coupled with aeration, corrosion control, disinfection, or fluoridation;

    4. A waterworks employing fluoridation which is not under a higher classification; or

    5. A waterworks classified by the Virginia Department of Health as a Class 3, 4, 5, or 6 waterworks.

    E. A Class 2 waterworks licensee may operate any waterworks as follows:

    1. A waterworks serving 5,000 or more persons but fewer than 50,000 persons or having a design hydraulic capacity of 0.5 MGD or more but less than 5.0 MGD employing chemical coagulation or lime softening in combination with one or more of the following; (i) sedimentation, (ii) rapid sand filtration, (iii) fluoridation, (iv) disinfection, (v) aeration, (vi) corrosion control, or (vii) membrane technologies;

    2. A waterworks serving fewer than 50,000 persons or having a design hydraulic capacity of less than 5.0 MGD which employs chemical coagulation or lime softening coupled with multimedia granular filtration or granular filtration at rates above 2.0 gpm/square foot (high rate filtration) in combination with one or more of the following: (i) sedimentation, (ii) fluoridation, (iii) disinfection, (iv) aeration, or (v) corrosion control;

    3. A waterworks employing biological activated carbon contactors or membrane technology requiring pretreatment other than pH adjustment; or

    4. A waterworks classified by the Virginia Department of Health as a Class 2, 3, 4, 5, or 6 waterworks.

    F. A Class 1 waterworks licensee may operate any waterworks as follows:

    1. A waterworks serving 50,000 or more persons or having a design hydraulic capacity of 5.0 MGD or more employing chemical coagulation or lime softening in combination with one or more of the following: (i) sedimentation, (ii) rapid sand filtration, (iii) fluoridation, (iv) disinfection, (v) aeration, (vi) corrosion control, or (vii) membrane technologies;

    2. A waterworks serving 50,000 or more persons or having a design hydraulic capacity of 5.0 MGD or more that employs chemical coagulation or lime softening coupled with multimedia granular filtration or granular filtration at rates above 2.0 gpm/square foot (high rate filtration) in combination with one or more of the following: (i) sedimentation, (ii) fluoridation, (iii) disinfection, (iv) aeration, or (v) corrosion control;

    3. A waterworks employing biological activated carbon contactors or membrane technology requiring pretreatment other than pH adjustment; or

    4. A waterworks classified by the Virginia Department of Health as a Class 1, 2, 3, 4, 5, or 6 waterworks.

    G. The term membrane technologies includes (i) electrodialysis reversal, (ii) reverse osmosis, (iii) ultrafiltration, (iv) microfiltration, and (v) nanofiltration.

Historical Notes

Derived from Volume 17, Issue 09, eff. February 15, 2001; amended, Virginia Register Volume 26, Issue 06, eff. January 1, 2010.

Statutory Authority

§§ 54.1-201 and 54.1-2301 of the Code of Virginia.