Water Hardness in Indiana

92 counties — Average 264.5 PPM (Very Hard)

1
3
12
76
Soft (1.1%) Moderate (3.3%) Hard (13.0%) Very Hard (82.6%)

Indiana Water Hardness Map

Soft   Moderate   Hard   Very Hard

Hardest Water Counties

Adams326.5 PPM
Allen290 PPM
Bartholomew299.5 PPM
Benton336 PPM
Blackford371 PPM
Boone319.5 PPM
Carroll307 PPM
Cass306 PPM
Clay240 PPM
Clinton341 PPM
Daviess251 PPM
DeKalb297 PPM
+64 more
Indiana

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All 92 Counties — By Water Hardness

CountyClassificationHardness
Adams Very Hard 326.5 PPM
Allen Very Hard 290 PPM
Bartholomew Very Hard 299.5 PPM
Benton Very Hard 336 PPM
Blackford Very Hard 371 PPM
Boone Very Hard 319.5 PPM
Brown Moderate 64.5 PPM
Carroll Very Hard 307 PPM
Cass Very Hard 306 PPM
Clark Moderate 99 PPM
Clay Very Hard 240 PPM
Clinton Very Hard 341 PPM
Crawford Hard 150.5 PPM
Daviess Very Hard 251 PPM
DeKalb Very Hard 297 PPM
Dearborn Very Hard 220 PPM
Decatur Very Hard 280 PPM
Delaware Very Hard 326.5 PPM
Dubois Moderate 96 PPM
Elkhart Very Hard 286 PPM
Fayette Very Hard 332 PPM
Floyd Soft 1.8 PPM
Fountain Very Hard 307 PPM
Franklin Very Hard 280 PPM
Fulton Very Hard 300 PPM
Gibson Very Hard 210 PPM
Grant Very Hard 319.5 PPM
Greene Very Hard 228 PPM
Hamilton Very Hard 326 PPM
Hancock Very Hard 294 PPM
Harrison Very Hard 187.5 PPM
Hendricks Very Hard 300 PPM
Henry Very Hard 374 PPM
Howard Very Hard 292 PPM
Huntington Very Hard 298 PPM
Jackson Very Hard 200 PPM
Jasper Very Hard 302 PPM
Jay Very Hard 374 PPM
Jefferson Hard 160 PPM
Jennings Very Hard 183 PPM
Johnson Very Hard 316 PPM
Knox Very Hard 270 PPM
Kosciusko Very Hard 276 PPM
LaGrange Very Hard 325 PPM
LaPorte Very Hard 240 PPM
Lake Hard 168 PPM
Lawrence Very Hard 213 PPM
Madison Very Hard 342 PPM
Marion Very Hard 308 PPM
Marshall Very Hard 340 PPM
Martin Very Hard 186 PPM
Miami Very Hard 248 PPM
Monroe Hard 160 PPM
Montgomery Very Hard 318 PPM
Morgan Very Hard 303 PPM
Newton Very Hard 306 PPM
Noble Very Hard 305 PPM
Ohio Very Hard 189 PPM
Orange Hard 170 PPM
Owen Very Hard 260 PPM
Parke Very Hard 283 PPM
Perry Hard 130 PPM
Pike Very Hard 237.5 PPM
Porter Very Hard 262 PPM
Posey Very Hard 223 PPM
Pulaski Very Hard 300 PPM
Putnam Very Hard 285.5 PPM
Randolph Very Hard 330.5 PPM
Ripley Hard 177 PPM
Rush Very Hard 331 PPM
Scott Hard 145 PPM
Shelby Very Hard 310 PPM
Spencer Hard 169 PPM
St. Joseph Very Hard 280 PPM
Starke Very Hard 288 PPM
Steuben Very Hard 333 PPM
Sullivan Very Hard 280 PPM
Switzerland Very Hard 319 PPM
Tippecanoe Very Hard 300 PPM
Tipton Very Hard 310 PPM
Union Very Hard 314.5 PPM
Vanderburgh Hard 140 PPM
Vermillion Very Hard 310 PPM
Vigo Very Hard 290 PPM
Wabash Very Hard 266 PPM
Warren Very Hard 327 PPM
Warrick Hard 155.5 PPM
Washington Hard 180 PPM
Wayne Very Hard 335 PPM
Wells Very Hard 329.5 PPM
White Very Hard 314.5 PPM
Whitley Very Hard 358 PPM

Source: USGS Water Quality Portal

Frequently Asked Questions

How hard is the water in Indiana?

Indiana has an average water hardness of 264.5 PPM, classified as very hard. Out of 92 counties, 1 have soft water, 3 moderately hard, 12 hard, and 76 very hard.

Which Indiana counties have the hardest water?

Indiana has 76 counties with very hard water (above 180 mg/L). See the county table above for a complete breakdown by hardness level.

How do I check water hardness for my Indiana address?

Enter your ZIP code in the search box above to see your area's estimated water hardness, classification, and water utility information.