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WaterSafety
C

Grade C — Fair Water Systems

Score range: 50-64/100

Water systems with moderate safety concerns, some violations or contaminant issues.

27
Systems
13,312,662
People Served
75
Avg Score
8
Health Violations
Grade AGrade BGrade CGrade DGrade F

Grade C Water Systems (27)

Chicago

Chicago, Illinois

2,746,388 people
C

Philadelphia Water Department

Philadelphia, Pennsylvania

1,600,000 people
C

Cleveland Public Water System

Cleveland, Ohio

1,308,955 people
C

Denver Water Board

Denver, Colorado

1,287,000 people
C

Veolia Water New Jersey Hackensack

Haworth, New Jersey

792,713 people1 violation
C

Portland Water Bureau

Portland, Oregon

666,200 people1 violation
C

Kansas City Pws

Kansas City, Missouri

513,800 people1 violation
C

Mesa City Of

Mesa, Arizona

466,000 people
C

Saint Paul Regional Water Services

St. Paul, Minnesota

392,529 people
C

Winston-Salem, City Of

Pfafftown, North Carolina

388,060 people
C

Aquarion-Eastern Fairfield County

Shelton, Connecticut

351,756 people
C

Durham, City Of

Durham, North Carolina

322,083 people
C

Greensboro, City Of

Greensboro, North Carolina

319,588 people
C

Cocoa, City Of

Cocoa, Florida

294,039 people1 violation
C

Nj American Water - Western

Delran, New Jersey

264,586 people
C

Jersey City Mua

Hoboken, New Jersey

262,000 people1 violation
C

Thornton City Of

Thornton, Colorado

226,465 people
C

Wildwood City Water Department

Rio Grande, New Jersey

218,472 people
C

Gru - Murphree Wtp

Gainesville, Florida

195,681 people
C

Waterbury Water Department

Waterbury, Connecticut

107,271 people
C

St George City Water System

St George City, Utah

105,240 people
C

Norman Utilities Authority

Norman, Oklahoma

104,868 people1 violation
C

Wvawc - Huntington Dist

Charleston, West Virginia

98,647 people
C

Fort Smith Water Utilities

Fort Smith, Arkansas

86,209 people1 violation
C

Cicero

Cicero, Illinois

83,000 people1 violation
C

Hardin County Water District #2

Elizabethtown, Kentucky

76,326 people
C

Berkeley County Pswd-Potomac River

Martinsburg, West Virginia

34,786 people
C

Frequently Asked Questions

A Grade C rating means the water system scored between 50-64 out of 100 on our Water Safety Score. Water systems with moderate safety concerns, some violations or contaminant issues. The score factors in health-based violations (40%), contaminant exceedances (30%), enforcement history (20%), and monitoring compliance (10%).

27 water systems are currently rated Grade C, serving a combined population of 13,312,662 people. 8 of these systems have at least one health-based violation on record.

Use the search tool on our homepage to look up your water system by zip code. Every system in the US is graded A through F based on EPA violation data from the Safe Drinking Water Information System (SDWIS).