Stillwater

Stillwater, OK receives a water quality score of 65/100 (Grade C) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 4 public water systems serving the area.

Stillwater's water quality is near the national average. While most systems meet EPA standards, some violations have been recorded. Residents may wish to review their specific water system's report for contaminant details.

Stillwater's score of 65 is 27 points above the Oklahoma state average of 38, and below the nationwide average of roughly 78/100 across all U.S. states.

Homeowners and prospective buyers moving to this mid-size Oklahoma city should note that the local drinking water reflects a moderate tier of quality, influenced by the agricultural and oil and gas legacy of the south-central plains. Because Stillwater's supply is managed across several distinct water systems, residents will want to verify which specific provider feeds their property to understand their direct water profile. Although the municipal supply satisfies baseline safety requirements, these middle-of-the-road evaluations suggest that utilizing home filtration could be a practical choice for families looking to address potential regional runoff or historical industrial influences.

Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Oklahoma water quality rankings report →