| Size (Peak day design capacity, gallons per day) | less than 10,000 | 1 |
| Size (Peak day design capacity, gallons per day) | 10,000 - 50,000 | 2 |
| Size (Peak day design capacity, gallons per day) | 50,001 - 100,000 | 4 |
| Size (Peak day design capacity, gallons per day) | 100,001 - 500,000 | 9 |
| Size (Peak day design capacity, gallons per day) | 500,001 - 1,000,000 | 12 |
| Size (Peak day design capacity, gallons per day) | 1,000,001 - 5,000,000 | 16 |
| Size (Peak day design capacity, gallons per day) | 5,000,001 - 10,000,000 | 20 |
| Size (Peak day design capacity, gallons per day) | 10,000,001 - 50,000,000 | 25 |
| Size (Peak day design capacity, gallons per day) | greater than 50,000,000 | 30 |
| Water Supply Source | Groundwater | 2 |
| Water Supply Source | Groundwater under the direct influence of surface water | 4 |
| Water Supply Source | Surface water | 6 |
| Water Supply Source | Surface water maintaining filtration avoidance criteria under 18 AAC 80.620 | 8 |
| Water Supply Source | Seawater | 10 |
| Water Supply Source | Purchased treated water | 0 |
| Water Supply Source | Raw water storage tank | 3 |
| Pretreatment | Presedimentation basin | 4 |
| Pretreatment | Hydrocyclone or similar sand separator device | 2 |
| Pretreatment | Microscreen | 3 |
| Pretreatment | Roughing filter: Cartridge filter | 2 |
| Pretreatment | Roughing filter: Non-backwashable strainer or filter | 2 |
| Pretreatment | Roughing filter: Gravel or rock filter | 4 |
| Pretreatment | Roughing filter: Backwashable granular media filter | 8 |
| Pretreatment | Add-heat system to heat raw water | 2 |
| Adjustment and Corrosion Control | pH adjustment | 3 |
| Adjustment and Corrosion Control | Corrosion inhibitor | 3 |
| Adjustment and Corrosion Control | Limestone or calcite contactor | 2 |
| Adjustment and Corrosion Control | Sequestration | 3 |
| Aeration / Ion Exchange | Aeration: In-line venturi-type | 1 |
| Aeration / Ion Exchange | Aeration: Mechanical or diffused | 3 |
| Aeration / Ion Exchange | Degasification | 3 |
| Aeration / Ion Exchange | Ion exchange | 4 |
| Arsenic Treatment | Non-regenerated sorption processes, including activated alumina, modified activated alumina, and iron based sorbents | 3 |
| Arsenic Treatment | On-site regeneration of sorption process media | 10 |
| Activated Carbon | Cartridge or bag filter | 2 |
| Activated Carbon | Powdered activated carbon treatment | 4 |
| Activated Carbon | Granular activated carbon contactors | 4 |
| Activated Carbon | On-site regeneration of activated carbon | 16 |
| Oxidation | Hypochlorite solution | 3 |
| Oxidation | Gas chlorine | 12 |
| Oxidation | Potassium permanganate | 4 |
| Oxidation | Hydrogen peroxide | 5 |
| Ozonation | Ozonation without pure oxygen | 3 |
| Ozonation | Ozonation with pure liquefied oxygen | 4 |
| Ozonation | Ozonation with on-site generation of pure oxygen | 5 |
| Coagulation | Primary coagulant | 5 |
| Coagulation | Coagulant aid, flocculent, or filter aid (3 each up to 12) | 3 |
| Mixing | Mechanical mixers | 5 |
| Mixing | Injection mixers | 3 |
| Mixing | In-line blender mixers | 2 |
| Mixing | In-line static mixers | 0 |
| Flocculation | Hydraulic flocculator | 4 |
| Flocculation | Mechanical flocculator | 8 |
| Sedimentation | Tube settlers | 2 |
| Sedimentation | Inclined-plate, Lamella-type or equivalent | 2 |
| Sedimentation | Horizontal flow conventional clarifier | 4 |
| Sedimentation | Batch sedimentation | 2 |
| Sedimentation | Adsorption clarifier | 6 |
| Sedimentation | Up-flow solids contact | 10 |
| Sedimentation | Dissolved air flotation | 16 |
| Sedimentation | Combined rapid mix-coagulation-flocculation-sedimentation unit | 20 |
| Filtration | Cartridge or bag filter - single unit | 2 |
| Filtration | Cartridge or bag filters - staged, multiple units | 4 |
| Filtration | Slow sand | 4 |
| Filtration | Granular media | 8 |
| Filtration | Membrane filtration | 8 |
| Filtration | Membrane filtration integrated system | 12 |
| Filtration | Diatomaceous earth | 12 |
| Electro/Lime/Recarb | Electrodyalysis, electrodialysis reversal, distillation | 10 |
| Electro/Lime/Recarb | Lime softening | 16 |
| Electro/Lime/Recarb | Recarbonation | 8 |
| Fluoride | Sodium fluoride saturator | 2 |
| Fluoride | Sodium silicofluoride | 3 |
| Fluoride | Hydrofluorosilicic acid | 5 |
| Disinfection | Liquid and powdered hypochlorites | 3 |
| Disinfection | Additional points if hypochlorites are generated on-site | 2 |
| Disinfection | Gas chlorine | 12 |
| Disinfection | Chlorination using tablets | 1 |
| Disinfection | Ammonia addition for chloramination using liquid ammonia solution | 3 |
| Disinfection | Ammonia addition for chloramination using ammonia gas | 12 |
| Disinfection | Chlorine dioxide | 8 |
| Disinfection | Chlor-alkali on-site generation | 12 |
| Disinfection | Ozonation without pure oxygen | 3 |
| Disinfection | Ozonation with pure liquefied oxygen | 4 |
| Disinfection | Ozonation with on-site generation of pure oxygen | 5 |
| Disinfection | Ultraviolet light | 2 |
| Disinfection | Ultraviolet light, for meeting required inactivation | 4 |
| Storage | Water storage tank, for achieving CT | 3 |
| Storage | Tank capacity 1,000,000 gallons or greater | 3 |
| Storage | Tank capacity between 50,000 and 999,999 gallons | 2 |
| Storage | Tank capacity less than 50,000 gallons | 1 |
| Storage | Pressure tanks | 0 |
| Sludge Treatment | Discharge to sewer or other off-site treatment | 0 |
| Sludge Treatment | Discharge to on-site pond, septic tank, or lagoon | 2 |
| Sludge Treatment | Mechanical dewatering | 6 |
| Sludge Treatment | Filter backwash water or sludge supernatant recycling, groundwater source | 2 |
| Sludge Treatment | Filter backwash water or sludge supernatant recycling, surface water source | 3 |
| Other Treatment | Other water treatment | 0 |
