City Water Quality Guides

Independent water hardness data, contaminant reports, and filtration recommendations for 82 US and Canadian cities — sourced from utility annual reports and USGS surveys.

💧 82 Cities Covered

Very Hard (10+ gpg) Hard (7–10 gpg) Moderately Hard (3.5–7 gpg) Soft (0–3.5 gpg)

Alaska

Anchorage~1 gpg — Soft

Alabama

Birmingham~5 gpg — Mod. Hard

Arizona

Phoenix~16 gpg — Very Hard Scottsdale~16 gpg — Very Hard Tucson~14 gpg — Very Hard

Arkansas

Little Rock~6 gpg — Mod. Hard

California

Los Angeles~10 gpg — Hard San Diego~14 gpg — Very Hard San Francisco~1 gpg — Soft San Jose~10 gpg — Hard Sacramento~4 gpg — Mod. Hard Fresno~9 gpg — Hard

Colorado

Denver~5 gpg — Mod. Hard Colorado Springs~8 gpg — Hard

Florida

Miami~14 gpg — Very Hard Tampa~10 gpg — Hard Orlando~10 gpg — Hard Jacksonville~5 gpg — Mod. Hard

Georgia

Atlanta~8 gpg — Mod. Hard

Hawaii

Honolulu~4 gpg — Mod. Hard

Idaho

Boise~6 gpg — Mod. Hard

Illinois

Chicago~8 gpg — Hard

Indiana

Indianapolis~12 gpg — Hard

Iowa

Des Moines~9 gpg — Hard

Kansas

Wichita~10 gpg — Hard

Kentucky

Louisville~7 gpg — Mod. Hard Lexington~8 gpg — Hard

Louisiana

New Orleans~5 gpg — Mod. Hard Baton Rouge~5 gpg — Mod. Hard

Maryland

Baltimore~6 gpg — Mod. Hard

Michigan

Detroit~7 gpg — Mod. Hard Grand Rapids~9 gpg — Hard

Minnesota

Minneapolis~7 gpg — Mod. Hard

Missouri

Kansas City~9 gpg — Hard St. Louis~7 gpg — Mod. Hard

Nebraska

Omaha~13 gpg — Very Hard Lincoln~12 gpg — Very Hard

Nevada

Las Vegas~17 gpg — Very Hard

New Jersey

Newark~6 gpg — Mod. Hard

New Mexico

Albuquerque~8 gpg — Hard

New York

New York City~2 gpg — Soft Buffalo~7 gpg — Mod. Hard

North Carolina

Charlotte~5 gpg — Mod. Hard Raleigh~3 gpg — Soft Greensboro~3 gpg — Soft

Ohio

Columbus~9 gpg — Hard Cincinnati~8 gpg — Hard Cleveland~7 gpg — Mod. Hard

Oklahoma

Oklahoma City~14 gpg — Very Hard Tulsa~9 gpg — Hard

Oregon

Portland~1 gpg — Soft

Pennsylvania

Pittsburgh~6 gpg — Mod. Hard

Tennessee

Nashville~7 gpg — Mod. Hard Memphis~3 gpg — Soft

Texas

Houston~12 gpg — Very Hard San Antonio~15 gpg — Very Hard Dallas~10 gpg — Hard Austin~11 gpg — Hard Fort Worth~12 gpg — Hard El Paso~16 gpg — Very Hard

Utah

Salt Lake City~13 gpg — Very Hard

Virginia & DC

Virginia Beach~6 gpg — Mod. Hard Richmond~4 gpg — Mod. Hard Norfolk~6 gpg — Mod. Hard Washington DC~6 gpg — Mod. Hard

Washington

Seattle~1 gpg — Soft

Wisconsin

Milwaukee~9 gpg — Hard

Alberta

Calgary~9 gpg — Hard Edmonton~7 gpg — Mod. Hard

British Columbia

Vancouver~0.3 gpg — Soft Victoria~2 gpg — Soft Kelowna~8 gpg — Hard

Manitoba

Winnipeg~6 gpg — Mod. Hard

Nova Scotia

Halifax~2 gpg — Soft

Ontario

Toronto~7 gpg — Mod. Hard Ottawa~4 gpg — Mod. Hard Hamilton~11 gpg — Hard London~11 gpg — Hard Mississauga~7 gpg — Mod. Hard

Québec

Montréal~5 gpg — Mod. Hard Québec City~3 gpg — Soft

Saskatchewan

Regina~12 gpg — Hard Saskatoon~10 gpg — Hard

Don't see your city?

We're adding new cities regularly. In the meantime, check your city's annual water quality report (required by federal law, published every year) — search "[your city] water quality report [year]" or visit your utility's website.