Virginia Law

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

1. A waterworks serving fewer than 400 persons that provides no treatment or employs one or more of the following treatment processes: (i) hypochlorination for disinfection, (ii) corrosion control with calcite or magnesium oxide contactors or solution feed except with caustic, or (iii) sequestration by solution feed; or

2. A waterworks classified by VDH 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 that provides no treatment or employs one or more of the following treatment processes: (i) hypochlorination for disinfection, (ii) corrosion control with calcite or magnesium oxide contactors or solution feed except with caustic, or (iii) sequestration by solution feed; or

2. A waterworks classified by VDH as a Class 5 waterworks.

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

1. A waterworks or treatment facility serving fewer than 5,000 persons or having a treatment facility capacity of less than 0.5 MGD and employing one or more of the following: (i) disinfection other than with hypochlorination, (ii) caustic soda feed, (iii) iron and manganese removal, (iv) ion exchange, (v) slow sand filtration, (vi) aeration, (vii) rechlorination other than with hypochlorination, (viii) activated carbon contactors, (ix) membrane or other filtration technologies without chemical coagulation, or (x) fluoridation with a saturator; or

2. A waterworks classified by VDH as a Class 4 waterworks.

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

1. A waterworks or treatment facility serving fewer than 5,000 persons or having a treatment facility capacity less than 0.5 MGD, whichever is greater, and employing conventional filtration or chemical coagulation in combination with membrane filtration;

2. A waterworks or treatment facility serving 5,000 or more persons or having a treatment facility capacity of 0.5 MGD or more, whichever is greater, and employing one or more of the following: (i) disinfection other than with hypochlorination, (ii) caustic soda feed, (iii) iron and manganese removal, (iv) ion exchange, (v) slow sand filtration, (vi) aeration, (vii) rechlorination other than with hypochlorination, (viii) activated carbon contactors, (ix) membrane or other filtration technologies without chemical coagulation, or (x) fluoridation with a saturator or acid feed;

3. A waterworks or treatment facility employing fluoridation with other than a saturator not considered a Class 1 or Class 2 waterworks; or

4. A waterworks classified by VDH as a Class 3 waterworks.

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

1. A waterworks or treatment facility serving 5,000 or more persons but fewer than 50,000 persons or having a treatment facility capacity of 0.5 MGD or more but less than 5.0 MGD, whichever range applies, and employing rapid rate conventional filtration chemical coagulation in combination with membrane filtration;

2. A waterworks or treatment facility serving fewer than 50,000 persons or having a treatment facility capacity of less than 5.0 MGD employing high rate conventional filtration; or

3. A waterworks classified by the VDH as a Class 2 waterworks.

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

1. A waterworks or treatment facility serving 50,000 or more persons or having a treatment facility capacity of 5.0 MGD or more and employing conventional filtration or chemical coagulation in combination with membrane filtration; or

2. A waterworks classified by VDH as a Class 1 waterworks.