Drinking water quality · 2024
· Verified
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 — 6 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 29
- Over federal limit
- 6
- Approaching the limit
- 1
- Worst contaminant
- Total Dissolved Solids
- Service area
- UT
- Total Dissolved SolidsPhysical & aggregate · Range118–936 mg/Llimit 1 mg/L · 936.0× the limit
- BariumMetals · Reported level287 ug/Llimit 2 ug/L · 143.5× the limit
- CopperMetals · Range0–90 mg/Llimit 1.3 mg/L · 69.2× the limit
- AluminumMetals · Reported level200 ug/Llimit 50 ug/L · 4.0× the limit
- MercuryMetals · Range0–0.2 ug/Llimit 0.2 ug/L · 1.0× the limit
- ThalliumMetals · Range0–0.5 ug/Llimit 0.5 ug/L · 1.0× the limit
PFAS — EPA UCMR5 (2023–2025)
1 PFAS compound detected in St George, UT
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
Lithium
● Detected (no federal limit)2.3× the national p90 (76.59999999999991 mg/L across detecting U.S. systems)
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.
Historical readings · EPA Six-Year Review (2012–2019)
2 contaminants historically over EPA limits in St George, UT
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
ARSENIC worst: 2016 | 0.036 mg/L 3.6× 2.7× the national p90 | 0.01 mg/L | '12'13'14'15'16'17'18'19 |
GROSS BETA worst: 2014 | 5.2 mrem/yr 1.3× | 4 mrem/yr | '13'14'16 |
TTHM worst: 2017 | 0.0748 mg/L 94% | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
RADIUM 226 228 worst: 2015 | 3.7 pCi/L within near national p90 | 5 pCi/L | '13'14'15'16'17'18'19 |
NITRATE NITRITE worst: 2013 | 6.9 mg/L within | 10 mg/L | '13'18 |
FLUORIDE worst: 2015 | 2.3 mg/L within | 4 mg/L | '12'13'14'15'17'18 |
HAA5 worst: 2013 | 0.0311 mg/L within | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
GROSS ALPHA worst: 2014 | 7.6 pCi/L within | 15 pCi/L | '13'14'15'16'17'19 |
THALLIUM worst: 2018 | 0.00054 mg/L within | 0.002 mg/L | '17'18 |
ANTIMONY worst: 2018 | 0.0012 mg/L within below national p90 | 0.006 mg/L | '18 |
BARIUM worst: 2015 | 0.28 mg/L within above national p90 | 2 mg/L | '13'15'17'18 |
NITRATE worst: 2015 | 1 mg/L within | 10 mg/L | '12'13'14'15'16'17'18'19 |
LINDANE worst: 2017 | 0.000013 mg/L within below national p90 | 0.0002 mg/L | '17 |
CYANIDE worst: 2018 | 0.0087 mg/L within below national p90 | 0.2 mg/L | '18 |
CHROMIUM worst: 2015 | 0.0038 mg/L within below national p90 | 0.1 mg/L | '15 |
SELENIUM worst: 2017 | 0.00087 mg/L within | 0.05 mg/L | '17'18 |
CHLOROBENZENE worst: 2012 | 0.0005 mg/L within below national p90 | 0.1 mg/L | '12 |
URANIUM worst: 2015 | 0.0058 ug/L within below national p90 | 30 ug/L | '13'14'15'16 |
COPPER worst: 2012 | 0.1 mg/L below national p90 | — | '12'15'18 |
LEAD worst: 2018 | 0.014 mg/L | — | '18 |
BROMODICHLOROMETHANE worst: 2013 | 0.0068 mg/L | — | '13'15'18 |
BROMOFORM worst: 2013 | 0.0056 mg/L | — | '13'15'18 |
CHLOROFORM worst: 2013 | 0.006 mg/L | — | '13'18 |
DIBROMOCHLOROMETHANE worst: 2013 | 0.0063 mg/L | — | '13'15'18 |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 118–936 mg/LRangeCity of St. George Groundwater Sources | 1 mg/LMCL | At or above 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
| |||
| TurbidityA measure of cloudiness from suspended particles in the water. | 1.3 NTUReported levelWashington County Water Conservancy District Sources Sand Hollow Wells | 5 NTUMCL | 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
| |||
| 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 |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AluminumA common element sometimes used as a treatment coagulant. | 200 ug/LReported levelWashington County Water Conservancy District Sources Quail Creek WTP | 50 ug/LMCL | At or above the limit |
| MercuryA toxic metal from erosion of natural deposits and industrial runoff. | 0–0.2 ug/LRangeCity of St. George Groundwater Sources | 0.2 ug/LMCLG | At or above 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
| |||
| ManganeseA naturally occurring metal from soil and rock. | 2 ug/LReported levelWashington County Water Conservancy District Sources Sand Hollow Wells | 50 ug/LMCL | Within the 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
| |||
| 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 |
| 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
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| SulfateA naturally occurring mineral from rock and soil. | 1.38–451 mg/LRangeCity of St. George Groundwater Sources | 500 mg/LMCL | Approaching 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
| |||
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 |
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 | Detected — no federal 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
| |||
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 6 contaminants at or above the federal limit: Total Dissolved Solids, Barium, Copper, Aluminum, Mercury, and Thallium. 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. 24 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?
6 contaminants in St George, UT's 2024 report sit at or above the federal limit: Total Dissolved Solids (936.0× the limit); Barium (143.5× the limit); Copper (69.2× the limit); Aluminum (4.0× the limit); Mercury (1.0× the limit); Thallium (1.0× 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 Total Dissolved Solids, at 936.0× the federal threshold. It belongs to the physical & aggregate family of contaminants.
+Are any contaminants in St George, UT tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Sulfate. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+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.