Drinking water quality · 2024
· Verified
· PWSID UTAH27015
What's in St George, UT tap water
2 contaminants in St George, UT's water sat at or above a federal limit, led by Arsenic at 1.3x the limit.
- !2 contaminants at or above a federal limit — worst is Arsenic at 1.3x
- !18 of 27 core regulated contaminants reported — 9 never appear in this report
- ✓No open federal violations
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −33 contaminants at or above a federal limit
- −0 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −0 health-based violations resolved in the last 5 years
- −1 core regulated contaminants never reported (18/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
- Arsenic1.3× the federal limit1–13 ug/L · limit 10 ug/L
A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.
higher than 95% of U.S. systems
- Turbidity1.3× the federal limit1.3 NTU · limit 1 NTU
High turbidity can shelter microbes from disinfection; the EPA enforces it through a treatment-technique standard.
higher than 85% of U.S. systems
+27 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| TTHM | 0.58–56.6 ug/L | 80 ug/L |
| Fluoride | 0–2.12 mg/L | 4 mg/L |
| Combined Radium | 2.6 pCi/L | 5 pCi/L |
| Gross Alpha | 0–7.3 pCi/L | 15 pCi/L |
| Nitrate | 4 mg/L | 10 mg/L |
| Chlorine | 0.1–1.19 mg/L | 4 mg/L |
| HAA5 | 0–16.5 ug/L | 60 ug/L |
| Thallium | 0–0.5 ug/L | 2 ug/L |
| Antimony | 0–1 ug/L | 6 ug/L |
| Barium | 287 ug/L | 2000 ug/L |
| Mercury | 0–0.2 ug/L | 2 ug/L |
| Lead | 0.0014 mg/L | 0.015 mg/L |
| Selenium | 4 ug/L | 50 ug/L |
| Copper | 0–90 ug/L | 1300 ug/L |
| Cyanide | 0–5.4 ug/L | 200 ug/L |
| Sulfate | 1.38–451 mg/L | — |
| Aluminum | 200 ug/L | — |
| Calcium | 18–95 mg/L | — |
| Lithium | 0–180 ug/L | — |
| Magnesium | 38 mg/L | — |
| Manganese | 2 ug/L | — |
| Sodium | 5–153 mg/L | — |
| Escherichia coli (E. coli) | 0 | 0 |
| Total Coliform | 3 | 0 |
| TOC | 2.2 mg/L | — |
| Total Dissolved Solids | 118–936 mg/L | — |
| Gross Beta Particle Activity | 0–15.6 pCi/L | 0 pCi/L |
What this report doesn't tell you
9 of the 27 contaminants a community water system normally reports do not appear anywhere in St George, UT's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
Where your water comes from · EPA SDWIS
St George, UT's drinking water comes from ground water, drawn from 29 sources.
Source
- GUNLOCK · 8
- SNOW CANYON · 5
- TOLMAN · 2
- LEDGES
- + 13 more
Treatment
- ARSENIC SNOW CANYON EFFLUENT BLEND
- ARSENIC-WCWD PIPELINE WS040
- T-BONE CHLORINATOR
- + 11 more
Distribution
Also buys water from WASHINGTON COUNTY WCD - SAND HOLLOW, WASHINGTON COUNTY WCD - QUAIL LAKE, and 2 more.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based4 violations on record · most recent Sep 2015resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗