Safest Drinking Water in Kansas 2026
Kansas has 5 public water systems serving 1,299,636 people. The safest system is Water District 1 of Johnson Co in Kansas City with a score of 100/100.
Top 5 Water Systems in Kansas
| # | Water System | City | Pop. Served | Source | Violations | Score |
|---|---|---|---|---|---|---|
| 1 | Water District 1 of Johnson Co | Kansas City | 482,000 | Surface water | 0 | A (100) |
| 2 | Wichita, City Of | Wichita | 395,699 | Surface water | 0 | A (93) |
| 3 | Kansas City Board of Public Utilities | Kansas City | 152,960 | Ground water | 0 | B (82) |
| 4 | Olathe, City Of | Olathe | 143,014 | Surface water | 0 | B (80) |
| 5 | Topeka, City Of | Topeka | 125,963 | Surface water | 1 | D (64) |
Water quality data for Kansas is sourced from the EPA Safe Drinking Water Information System (SDWIS), which tracks compliance for all public water systems.
Frequently Asked Questions
Water District 1 of Johnson Co in Kansas City has the highest Water Safety Score in Kansas at 100/100 (Grade A), serving 482,000 people.
Kansas has 5 public water systems serving 1,299,636 people. The average Water Safety Score is 84/100.
The Water Safety Score (0-100) is based on health violations (40%), contaminant exceedances (30%), enforcement history (20%), and monitoring violations (10%). Higher scores mean cleaner, safer water.
Water Safety Score: health violations (40%), contaminant exceedances (30%), enforcement history (20%), monitoring violations (10%).
The this entity category groups every U.S. public drinking-water safety entity sharing this attribute. The list above is the data; the paragraphs below explain what the grouping means against the broader the EPA Safe Drinking Water Information System (SDWIS) distribution and how to read the relative rankings within the category.
For readers using this category as a starting point, the per-entity detail pages linked from the table above carry the underlying the EPA Safe Drinking Water Information System (SDWIS) data in full. The category-level view is the filter; the per-entity pages are the actual answer.
Source: EPA Ground Water and Drinking Water, 2026.