Hawaii Administrative Rules
Title 11 - DEPARTMENT OF HEALTH
Subtitle 1 - GENERAL DEPARTMENTAL PROVISIONS
Chapter 25 - RULES RELATING TO CERTIFICATION OF PUBLIC WATER SYSTEM OPERATORS
Section 11-25-11 - Classification of water treatment plants
Universal Citation: HI Admin Rules 11-25-11
Current through February, 2024
The classification of WTPs ascends with the complexity of treatment processes used. Class 1 plants are the simplest to operate and Class 4 plants the most difficult.
(1) Class 1, WTPs use the following technologies:
(A)
Slow sand filtration;
(B) Chemical
addition, such as for chlorination, fluoridation, pH control or corrosion
control;
(C) Granular activated
carbon filtration; or
(D) Packed
aeration towers or air stripping towers.
(2) Class 2 WTPs use the following technologies:
(A) Membrane
filtration;
(B) Cartridge
filtration; or
(C) Desalting
(including distillation, electrodialysis, and reverse osmosis).
(3) Class 3 WTPs use the following technologies:
(A) Diatomaceous earth
filtration; or
(B) Package WTPs
with features similar to those of diatomaceous earth filtration.
(4) Class 4 WTPs use the following technologies:
(A) Conventional treatment
(coagulation with rapid mixing, flocculation, sedimentation, and
filtration);
(B) Direct filtration
(conventional treatment without sedimentation); or
(C) Package WTPs with features similar to
those of conventional treatment or direct filtration plants.
Disclaimer: These regulations may not be the most recent version. Hawaii may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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