128 regional guides
Water Treatment Systems costs, county by county.
Whole-home filtration, softeners, reverse osmosis, and conditioner costs.
Typical range $250 – $5,520
Counties covered 128
Refreshed Monthly
Browse by county
Water Treatment Systems prices near you.
128 regional guides built from local labor, materials, and permitting data — not national averages.
- Aleutians West Census Area $300 – $4,000
- Anchorage Municipality $300 – $4,000
- Bristol Bay Borough $300 – $4,000
- Nome Census Area $300 – $4,000
- North Slope Borough $300 – $4,000
- Northwest Arctic Borough $300 – $4,000
- Autauga County $275 – $3,640
- Baldwin County $265 – $3,520
- Barbour County $275 – $3,640
- Bibb County $275 – $3,640
- Blount County $275 – $3,640
- Bullock County $275 – $3,640
- Butler County $275 – $3,640
- Calhoun County $275 – $3,640
- Colbert County $275 – $3,640
- Jefferson County $275 – $3,640
- Shelby County $275 – $3,640
- St. Clair County $275 – $3,640
- Tallapoosa County $275 – $3,640
- Tuscaloosa County $275 – $3,640
- Walker County $275 – $3,640
- Washington County $275 – $3,640
- Wilcox County $275 – $3,640
- Winston County $275 – $3,640
- Crittenden County $275 – $3,680
- Faulkner County $250 – $3,360
- Lonoke County $250 – $3,360
- Perry County $250 – $3,360
- Pulaski County $250 – $3,360
- Saline County $250 – $3,360
- Apache County $290 – $3,840
- Maricopa County $300 – $4,000
- Pima County $300 – $4,000
- Pinal County $305 – $4,040
- Alameda County $360 – $4,800
- Contra Costa County $360 – $4,800
- El Dorado County $320 – $4,240
- Fresno County $315 – $4,200
- Kern County $320 – $4,240
- Los Angeles County $320 – $4,280
- Madera County $315 – $4,200
- Orange County $325 – $4,360
- Placer County $320 – $4,240
- Riverside County $310 – $4,120
- Sacramento County $320 – $4,240
- San Bernardino County $310 – $4,120
- San Diego County $310 – $4,160
- San Francisco County $340 – $4,560
- San Joaquin County $305 – $4,080
- San Mateo County $360 – $4,800
- Santa Clara County $415 – $5,520
- Stanislaus County $310 – $4,120
- Ventura County $310 – $4,160
- Yolo County $320 – $4,240
- Adams County $305 – $4,080
- Arapahoe County $305 – $4,080
- Broomfield County $305 – $4,080
- Clear Creek County $305 – $4,080
- Denver County $305 – $4,040
- Douglas County $305 – $4,080
- El Paso County $290 – $3,840
- Elbert County $305 – $4,080
- Gilpin County $305 – $4,080
- Jefferson County $305 – $4,080
- Park County $305 – $4,080
- Capitol Planning Region $310 – $4,160
- Greater Bridgeport Planning Region $325 – $4,320
- Lower Connecticut River Valley Planning Region $310 – $4,160
- South Central Connecticut Planning Region $320 – $4,240
- Western Connecticut Planning Region $325 – $4,320
- District of Columbia $305 – $4,040
- New Castle County $335 – $4,480
- Brevard County $275 – $3,640
- Broward County $270 – $3,600
- Clay County $270 – $3,600
- Duval County $270 – $3,600
- Flagler County $260 – $3,480
- Hernando County $265 – $3,520
- Hillsborough County $265 – $3,520
- Lake County $265 – $3,520
- Lee County $260 – $3,480
- Miami-Dade County $265 – $3,560
- Nassau County $270 – $3,600
- Orange County $265 – $3,520
- Osceola County $265 – $3,520
- Palm Beach County $270 – $3,600
- Pasco County $265 – $3,520
- Pinellas County $265 – $3,520
- Polk County $260 – $3,480
- St. Johns County $270 – $3,600
- Fulton County $280 – $3,720
- Hawaii County $300 – $4,000
- Ada County $275 – $3,640
- Bear Lake County $275 – $3,640
- Cook County $355 – $4,760
- Lake County $355 – $4,760
- Middlesex County $350 – $4,640
- Wayne County $320 – $4,240
- Hennepin County $350 – $4,680
- St. Louis County $320 – $4,240
- Beaverhead County $300 – $4,000
- Big Horn County $300 – $4,000
- Blaine County $300 – $4,000
- Broadwater County $300 – $4,000
- Carbon County $300 – $4,000
- Roosevelt County $300 – $4,000
- Rosebud County $300 – $4,000
- Sanders County $300 – $4,000
- Sheridan County $300 – $4,000
- Silver Bow County $300 – $4,000
- Stillwater County $300 – $4,000
- Sweet Grass County $300 – $4,000
- Mecklenburg County $265 – $3,520
- Franklin County $295 – $3,920
- Multnomah County $365 – $4,880
- Allegheny County $305 – $4,080
- Philadelphia County $325 – $4,360
- Bristol County $335 – $4,440
- Providence County $335 – $4,440
- Washington County $335 – $4,440
- Dallas County $280 – $3,760
- Harris County $275 – $3,680
- Tarrant County $280 – $3,760
- Travis County $285 – $3,800
- Salt Lake County $290 – $3,880
- Fairfax County $305 – $4,040
- King County $365 – $4,840
- Snohomish County $365 – $4,840
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