Drinking water quality · 2024
What's in St George, UT tap water
29 contaminants were measured in the St George, UT water system's 2024 annual report. Each is shown below against its federal limit — 2 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 29
- Over federal limit
- 2
- Approaching the limit
- 0
- Worst contaminant
- Arsenic
- Service area
- UT
1.3× the limit
state-level CCR
Where your water comes from · EPA SDWIS
St George, UT's drinking water comes from ground water, drawn from 29 sources.
Source
29ground water
- GUNLOCK · 8
- SNOW CANYON · 5
- TOLMAN · 2
- LEDGES
- + 13 more
Treatment
14treatment plants
- ARSENIC SNOW CANYON EFFLUENT BLEND
- ARSENIC-WCWD PIPELINE WS040
- T-BONE CHLORINATOR
- + 11 more
Distribution
20storage units
Also buys water from WASHINGTON COUNTY WCD - SAND HOLLOW, WASHINGTON COUNTY WCD - QUAIL LAKE, and 2 more.
Source: EPA SDWIS facilities inventory. Methodology.
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 ↗
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 1–13 ug/LReported levelWashington County Water Conservancy District Sources Quail Creek WTP | 0 ug/LMCLG | At or above the limit |
+By source (3)— Washington County Water Conservancy District Sources Quail Creek WTP, Washington County Water Conservancy District Sources Sand Hollow Wells, City of St. George Groundwater Sources
| |||
| Thallium | 0–0.5 ug/LRangeCity of St. George Groundwater Sources | None set | Within the limit |
+By source (3)— City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Quail Creek WTP, Washington County Water Conservancy District Sources Sand Hollow Wells
| |||
| Antimony | 0–1 ug/LRangeCity of St. George Groundwater Sources | None set | Within the limit |
+By source (3)— City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Quail Creek WTP, Washington County Water Conservancy District Sources Sand Hollow Wells
| |||
| BariumA metal from erosion of natural deposits and industrial discharge. | 287 ug/LReported levelWashington County Water Conservancy District Sources Sand Hollow Wells | 2 ug/LMCLG | Within the limit |
+By source (3)— Washington County Water Conservancy District Sources Sand Hollow Wells, City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Quail Creek WTP
| |||
| MercuryA toxic metal from erosion of natural deposits and industrial runoff. | 0–0.2 ug/LRangeCity of St. George Groundwater Sources | None set | Within the limit |
+By source (3)— City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Quail Creek WTP, Washington County Water Conservancy District Sources Sand Hollow Wells
| |||
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.0014 mg/L90th percentileAt the tap | 0.015 mg/LAction level | Within the limit |
| SeleniumA trace element from natural deposits and industrial discharge. | 4 ug/LReported levelWashington County Water Conservancy District Sources Sand Hollow Wells | None set | Within the limit |
+By source (3)— Washington County Water Conservancy District Sources Sand Hollow Wells, City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Quail Creek WTP
| |||
| CopperA metal that enters water from corroding household plumbing. | 0–90 ug/LRangeCity of St. George Groundwater Sources | 1.3 ug/LMCLG | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | 200 ug/LReported levelWashington County Water Conservancy District Sources Quail Creek WTP | None set | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 18–95 mg/LRangeCity of St. George Groundwater Sources | None set | Detected — no federal limit |
+By source (2)— City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Quail Creek WTP
| |||
| LithiumA naturally occurring element found in some groundwater. | 0–180 ug/LRangeCity of St. George Groundwater Sources | None set | Detected — no federal limit |
+By source (3)— City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Quail Creek WTP, Washington County Water Conservancy District Sources Sand Hollow Wells
| |||
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 38 mg/LReported levelWashington County Water Conservancy District Sources Quail Creek WTP | None set | Detected — no federal limit |
| ManganeseA naturally occurring metal from soil and rock. | 2 ug/LReported levelWashington County Water Conservancy District Sources Sand Hollow Wells | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 5–153 mg/LRangeCity of St. George Groundwater Sources | None set | Detected — no federal limit |
+By source (3)— City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Sand Hollow Wells, Washington County Water Conservancy District Sources Quail Creek WTP
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 1.3 NTUReported levelWashington County Water Conservancy District Sources Sand Hollow Wells | 1 NTUMCL | At or above the limit |
+By source (3)— Washington County Water Conservancy District Sources Sand Hollow Wells, City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Quail Creek WTP
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2.2 mg/LReported levelWashington County Water Conservancy District Sources Quail Creek WTP | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 118–936 mg/LRangeCity of St. George Groundwater Sources | None set | Detected — no federal limit |
+By source (3)— City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Quail Creek WTP, Washington County Water Conservancy District Sources Sand Hollow Wells
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 0.58–56.6 ug/LRangeCity of St. George Groundwater Sources | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 0–16.5 ug/LRangeCity of St. George Groundwater Sources | None set | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0–2.12 mg/LRangeCity of St. George Groundwater Sources | 4 mg/LMCLG | Within the limit |
+By source (3)— City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Sand Hollow Wells, Washington County Water Conservancy District Sources Quail Creek WTP
| |||
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 4 mg/LReported levelWashington County Water Conservancy District Sources Sand Hollow Wells | 10 mg/LMCLG | Within the limit |
+By source (3)— Washington County Water Conservancy District Sources Sand Hollow Wells, City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Quail Creek WTP
| |||
| Cyanide | 0–5.4 ug/LRangeCity of St. George Groundwater Sources | None set | Within the limit |
+By source (3)— City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Quail Creek WTP, Washington County Water Conservancy District Sources Sand Hollow Wells
| |||
| SulfateA naturally occurring mineral from rock and soil. | 1.38–451 mg/LRangeCity of St. George Groundwater Sources | None set | Detected — no federal limit |
+By source (3)— City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Quail Creek WTP, Washington County Water Conservancy District Sources Sand Hollow Wells
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 2.6 pCi/LReported levelWashington County Water Conservancy District Sources Sand Hollow Wells | 0 pCi/LMCLG | Within the limit |
+By source (3)— Washington County Water Conservancy District Sources Sand Hollow Wells, City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Quail Creek WTP
| |||
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0–7.3 pCi/LRangeCity of St. George Groundwater Sources | 0 pCi/LMCLG | Within the limit |
+By source (3)— City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Sand Hollow Wells, Washington County Water Conservancy District Sources Quail Creek WTP
| |||
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 0–15.6 pCi/LRangeCity of St. George Groundwater Sources | 0 pCi/LMCLG | Detected — no federal limit |
+By source (3)— City of St. George Groundwater Sources, Washington County Water Conservancy District Sources Sand Hollow Wells, Washington County Water Conservancy District Sources Quail Creek WTP
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.1–1.19 mg/LRangeCity of St. George Groundwater Sources | 4 mg/LMCLG | Within the limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0RangeCity of St. George Groundwater Sources | 0MCLG | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 3RangeCity of St. George Groundwater Sources | 0MCLG | Detected — no federal limit |
Source: St George, UT's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.
People also ask about St George, UT's water
+Is St George, UT tap water safe to drink in 2024?
The 2024 Consumer Confidence Report for the St George, UT water utility lists 2 contaminants at or above the federal limit: Arsenic and Turbidity. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in St George, UT tap water?
29 contaminants were measured in St George, UT's 2024 Consumer Confidence Report, spanning metals, inorganic chemicals, and physical & aggregate. 13 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in St George, UT tap water?
2 contaminants in St George, UT's 2024 report sit at or above the federal limit: Arsenic (1.3× the limit); Turbidity (1.3× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in St George, UT tap water?
The contaminant with the highest measured value relative to its federal limit in the 2024 report is Arsenic, at 1.3× the federal threshold. It belongs to the metals family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from St George, UT's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is St George, UT's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.
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