Statutes, codes, and regulations
Iowa Administrative Code
Agency 567 - ENVIRONMENTAL PROTECTION COMMISSIONTitle VI - CERTIFICATION OF OPERATORS
Chapter 81 - OPERATOR CERTIFICATION: PUBLIC WATER SUPPLY SYSTEMS AND WASTEWATER TREATMENT SYSTEMS
Rule 567-81.4 - Water treatment plant grades

Iowa Admin. Code r. 567-81.4

Download
PDF
Current through Register Vol. 47, No. 6, September 18, 2024
Rule 567-81.4 - Water treatment plant grades
(1)Classifications. The water treatment plant classifications are listed in the following table:

Water Treatment Plant Classifications

Treatment Type Grade*
Average Daily Pumpage in MGD
0-0.1 >0.1-0.5 >0.5-1.5 >1.5
1. Iron or manganese removal; aeration; chlorination; fluoridation; stabilization; any other chemical addition; or any combination of these processes I II II III
2. Ion exchange II II III III
3. Direct surface water filtration II II III III
4. Utilization of lime, soda ash or other chemical addition for pH adjustment in the precipitation and coagulation of iron or manganese II II III III
5. Complete surface water clarification or lime softening of surface water or groundwater III III III IV
6. Reverse osmosis and electrodialysis II II III IV
7. Activated carbon for THM or synthetic organics removal III III III IV

*For Grade A water supply classification, see subrule 81.6(1).

(2)Average daily pumpage. When the average daily pumpage is unknown, the plant grade will be determined from the population of the most recent census and an evaluation of commercial, industrial, and other users.

Iowa Admin. Code r. 567-81.4