Safest Water Systems
Large water systems with the best safety records
Washington Suburban Sanitary Commission in Laurel, MD has a perfect 100/100 safety score serving 1,900,000 people.
| # | Name | Metric | Grade |
|---|---|---|---|
| 1 | Washington Suburban Sanitary Commission Grade A, Laurel, MD, serves 1,900,000 | 100 | A |
| 2 | East Bay MUD Grade A, Oakland, CA, serves 1,442,800 | 100 | A |
| 3 | Dallas Water Utility Grade A, Dallas, TX, serves 1,356,479 | 100 | A |
| 4 | Charlotte Water Grade A, Charlotte, NC, serves 1,163,701 | 100 | A |
| 5 | Mo American St Louis St Charles Counties Grade A, Chesterfield, MO, serves 1,111,000 | 100 | A |
| 6 | Gwinnett Co. Dept. of Water Resources Grade A, Lawrenceville, GA, serves 975,000 | 100 | A |
| 7 | Louisville Water Company Grade A, Louisville, KY, serves 764,769 | 100 | A |
| 8 | Cincinnati Public Water System Grade A, Cincinnati, OH, serves 750,200 | 100 | A |
| 9 | Cobb County Grade A, Marietta, GA, serves 695,000 | 100 | A |
| 10 | Memphis Light, Gas, & Water Grade A, Memphis, TN, serves 659,500 | 100 | A |
Washington Suburban Sanitary Commission in Laurel, MD has a perfect 100/100 safety score serving 1,900,000 people.
Frequently Asked Questions
This report is auto-generated from real public data sources. Entities are ranked by their key metrics and the most notable changes and extremes are highlighted.
The underlying data is refreshed on a regular schedule. This report was generated from the most recent available data (last updated April 2026).
The primary metric varies by report type. It may represent a score, dollar amount, rate, or count depending on what the report is measuring.
Source: EPA Ground Water and Drinking Water, 2026.