USA Water Quality
Browse water hardness, PFAS levels, and quality ratings across 51 states and 3,887 cities. Sourced from the USGS Water Quality Portal & EPA.
3,887
Cities
51
States
151 mg/L
Avg Hardness
🟠 Hard
Avg Category
🔴 Hardest: Nevada (324 mg/L)
🟢 Softest: Alaska (39 mg/L)
Alabama
🟡 Moderately Hard57 cities97 mg/L · 5.7 gpg
View cities →Alaska
🟢 Soft7 cities39 mg/L · 2.3 gpg
View cities →Arizona
🔴 Very Hard60 cities311 mg/L · 18.2 gpg
View cities →Arkansas
🟠 Hard31 cities150 mg/L · 8.8 gpg
View cities →California
🟡 Moderately Hard490 cities107 mg/L · 6.3 gpg
View cities →Colorado
🟡 Moderately Hard55 cities114 mg/L · 6.7 gpg
View cities →Connecticut
🟢 Soft71 cities55 mg/L · 3.2 gpg
View cities →Delaware
🟡 Moderately Hard8 cities118 mg/L · 6.9 gpg
View cities →District of Columbia
🟡 Moderately Hard22 cities113 mg/L · 6.6 gpg
View cities →Florida
🔴 Very Hard284 cities188 mg/L · 11.0 gpg
View cities →Georgia
🟡 Moderately Hard92 cities117 mg/L · 6.8 gpg
View cities →Hawaii
🟢 Soft44 cities46 mg/L · 2.7 gpg
View cities →Idaho
🟡 Moderately Hard20 cities76 mg/L · 4.4 gpg
View cities →Illinois
🔴 Very Hard239 cities198 mg/L · 11.6 gpg
View cities →Indiana
🔴 Very Hard69 cities189 mg/L · 11.0 gpg
View cities →Iowa
🔴 Very Hard31 cities253 mg/L · 14.8 gpg
View cities →Kansas
🔴 Very Hard29 cities302 mg/L · 17.6 gpg
View cities →Kentucky
🟠 Hard42 cities163 mg/L · 9.5 gpg
View cities →Louisiana
🟡 Moderately Hard43 cities103 mg/L · 6.0 gpg
View cities →Maine
🟢 Soft14 cities40 mg/L · 2.3 gpg
View cities →Maryland
🟠 Hard111 cities141 mg/L · 8.2 gpg
View cities →Massachusetts
🟡 Moderately Hard153 cities75 mg/L · 4.4 gpg
View cities →Michigan
🟠 Hard86 cities162 mg/L · 9.5 gpg
View cities →Minnesota
🔴 Very Hard87 cities183 mg/L · 10.7 gpg
View cities →Mississippi
🟡 Moderately Hard36 cities100 mg/L · 5.8 gpg
View cities →Missouri
🔴 Very Hard67 cities186 mg/L · 10.9 gpg
View cities →Montana
🟡 Moderately Hard7 cities109 mg/L · 6.4 gpg
View cities →Nebraska
🔴 Very Hard15 cities315 mg/L · 18.4 gpg
View cities →Nevada
🔴 Very Hard21 cities324 mg/L · 18.9 gpg
View cities →New Hampshire
🟢 Soft16 cities45 mg/L · 2.6 gpg
View cities →New Jersey
🟡 Moderately Hard162 cities110 mg/L · 6.4 gpg
View cities →New Mexico
🔴 Very Hard17 cities231 mg/L · 13.5 gpg
View cities →New York
🟠 Hard256 cities122 mg/L · 7.1 gpg
View cities →North Carolina
🟠 Hard78 cities120 mg/L · 7.0 gpg
View cities →North Dakota
🔴 Very Hard9 cities275 mg/L · 16.1 gpg
View cities →Ohio
🔴 Very Hard157 cities183 mg/L · 10.7 gpg
View cities →Oklahoma
🔴 Very Hard37 cities239 mg/L · 14.0 gpg
View cities →Oregon
🟢 Soft52 cities59 mg/L · 3.4 gpg
View cities →Pennsylvania
🟠 Hard121 cities152 mg/L · 8.9 gpg
View cities →Rhode Island
🟢 Soft24 cities56 mg/L · 3.3 gpg
View cities →South Carolina
🟡 Moderately Hard46 cities104 mg/L · 6.1 gpg
View cities →South Dakota
🔴 Very Hard9 cities267 mg/L · 15.6 gpg
View cities →Tennessee
🟠 Hard50 cities161 mg/L · 9.4 gpg
View cities →Texas
🔴 Very Hard223 cities268 mg/L · 15.7 gpg
View cities →Utah
🔴 Very Hard50 cities253 mg/L · 14.8 gpg
View cities →Vermont
🟢 Soft4 cities48 mg/L · 2.8 gpg
View cities →Virginia
🟠 Hard91 cities137 mg/L · 8.0 gpg
View cities →Washington
🟢 Soft105 cities48 mg/L · 2.8 gpg
View cities →West Virginia
🟠 Hard13 cities150 mg/L · 8.8 gpg
View cities →Wisconsin
🔴 Very Hard69 cities186 mg/L · 10.9 gpg
View cities →Wyoming
🟡 Moderately Hard7 cities111 mg/L · 6.5 gpg
View cities →