Ariz. Admin. Code § R18-5-115 - Grades of Water Treatment Plants and Distribution Systems
Plant Characteristics |
Points |
Population |
1 per 5,000 |
Maximum Design Capacity |
1 per Millions of Gallons per Day up to 10 |
Groundwater Source |
3 |
Surface or Groundwater Under the Direct Influence of Surface Water Source |
5 |
Carbon Dioxide |
2 |
pH Adjustment |
3 |
Packed Tower Aeration |
6 |
Air Stripping |
6 |
Stability or Corrosion Control |
3 |
Taste and Odor |
8 |
Iron/Manganese Removal |
8 |
Ion Exchange Softening |
10 |
Chemical Precipitation Softening |
15 |
Coagulant Addition |
6 |
Flocculation |
4 |
Sedimentation |
4 |
Upflow Clarification |
2 |
Fluoridation |
5 |
Activated Alumina |
6 |
Blending |
5 |
Residual Waste Stream |
5 |
Control Systems Technology |
2 |
Biologically Active Filter |
20 |
Granular Media Filter |
15 |
Pressure Filter |
15 |
Gravity Sand Filter |
10 |
Membrane Filtration |
15 |
Chlorine Gas |
6 |
Hypochlorite Liquid |
2 |
Hypochlorite Solid |
2 |
Chloramine |
9 |
Chlorine Dioxide |
9 |
Ozone |
12 |
Ultraviolet |
3 |
Grade |
Point Range |
Grade 1 |
1 to 25 |
Grade 2 |
26 to 50 |
Grade 3 |
51 to 70 |
Grade 4 |
More than 70 |
System Characteristics |
Points |
Population |
1 per 5,000 |
Maximum Design Capacity |
1 per Millions of Gallons per Day up to 10 |
Pressure Zones |
5 |
Booster Stations |
5 |
Storage Tanks |
3 |
Blending |
5 |
Fire Protection Systems/Testable Backflow Prevention Assemblies* |
5 |
Cathodic Protection |
3 |
Control System Technologies |
2 |
Chlorine Gas |
6 |
Hypochlorite Liquid |
2 |
Hypochlorite Solid |
2 |
Chloramine |
9 |
Chlorine Dioxide |
9 |
*The presence of one or both of these devices earns five points for the facility.
Grade |
Point Range |
Grade 1 |
0 |
Grade 2 |
1 to 20 |
Grade 3 |
21 to 35 |
Grade 4 |
More than 35 |
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.