Salt Lake City Water System
Salt Lake City, Utah · PWSID: UTAH18026
Salt Lake City Water Quality Summary
Salt Lake City Water System supplies drinking water to about 381,174 people in Salt Lake City, Utah, and draws from surface water (rivers, lakes, or reservoirs), which requires fuller treatment for runoff, sediment, and microbial risk. On the IsWaterSafe scale it earns a failing Water Safety Score of 54 out of 100 (Grade F), a composite of its EPA SDWIS violation and contaminant record.
EPA records show 2 health-based violations for this system plus 6 monitoring violations. A health-based violation means a contaminant exceeded its legal EPA limit, the most serious category in the Safe Drinking Water Act. The system has 15 enforcement actions on file in response.
Across the single substance sampled, none exceeded its EPA limit. E. coli sits highest relative to its ceiling, detected at 0 presence against an MCL of 0 presence (sampled November 2017) — within the legal limit.
The most recent documented episode is a monitoring violation involving E. coli, beginning July 2018 and marked resolved July 2018.
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Detected Contaminants
| Contaminant | Detected Level | MCL (Limit) | Status | Sample Date |
|---|---|---|---|---|
| E. coli | 0 presence | 0 presence | Within Limit | Nov 1, 2017 |
Violation History
Frequently Asked Questions
Salt Lake City Water System has a Water Safety Score of F (54/100). The system serves 381,174 people and has 2 health violations on record. Check the contaminant table above for specific detected substances.
Salt Lake City Water System has 0 contaminant exceedances above EPA health guidelines. See the full contaminant detection table above for all tested substances and their levels relative to legal limits and health guidelines.
The Water Safety Score (0-100, grades A through F) is based on contaminant levels relative to legal limits, health guideline exceedances, violation history, and enforcement actions. Higher scores indicate fewer concerns.
If your water system has violations, request the Consumer Confidence Report from your utility, consider getting an independent water test from a certified lab, and look into certified water filters for specific contaminants of concern. For lead, run cold water for 30 seconds before drinking.
Water quality data sourced from EPA's Safe Drinking Water Information System (SDWIS). Safety scores are calculated based on contaminant levels, violations, and enforcement history. This is not a substitute for your utility's official Consumer Confidence Report.
Source: EPA Ground Water and Drinking Water, 2026.