What was found in Marble Falls's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 3761.5 µg/L 38% of the EPA limit 10000 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 4940 µg/L — SUNSET HILLS SUBDIVISION · 324 people · 2019 | 10/10 | SYR4 |
| Nitrate-Nitrite | 3930 µg/L 39% of the EPA limit 10000 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2013
Highest in the city: 4232 µg/L — SUNSET HILLS SUBDIVISION · 324 people · 2015 | 9/10 | SYR4 |
| Fluoride | 176.5 µg/L 4.4% of the EPA limit 4000 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 1668 µg/L — WILDERNESS COVE · 282 people · 2018 | 10/10 | SYR4 |
| Copper | 228.8 µg/L 18% of the EPA limit 1300 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2017
Highest in the city: 1425.5 µg/L — VISTA DEL RIO · 126 people · 2019 | 10/10 | SYR4 |
| Barium | 72.04 µg/L 3.6% of the EPA limit 2000 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 215.1 µg/L — VISTA DEL RIO · 126 people · 2018 | 10/10 | SYR4 |
| TTHM | 40.045 µg/L 50% of the EPA limit 80 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 156 µg/L — VISTA DEL RIO · 126 people · 2019 | 10/10 | SYR4 |
| Chlorite | 131.7 µg/L 13% of the EPA limit 1000 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019 | 1/10 | SYR4 |
| Cyanide | 116 µg/L 58% of the EPA limit 200 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019 | 2/10 | SYR4 |
| Dibromochloromethane | 9.165 µg/L No EPA limit set Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 53.53 µg/L — VISTA DEL RIO · 126 people · 2019 | 10/10 | SYR4 |
| Bromodichloromethane | 13.5 µg/L No EPA limit set Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 52.31 µg/L — VISTA DEL RIO · 126 people · 2019 | 9/10 | SYR4 |
| Total Haloacetic Acids (HAA5) | 37.34 µg/L 62% of the EPA limit 60 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 42.3 µg/L — CAPSTONE SUBDIVISION · 81 people · 2019 | 10/10 | SYR4 |
| Chloroform | 19.37 µg/L No EPA limit set Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 32.15 µg/L — VISTA DEL RIO · 126 people · 2019 | 9/10 | SYR4 |
| Gross Beta Particle Activity | 22.9 pCi/L No EPA limit set Highest in the city: HIGH SIERRA WATER SYSTEM · 213 people · 2019 | 4/10 | SYR4 |
| Dichloroacetic Acid | 22.415 µg/L No EPA limit set Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019 | 8/10 | SYR4 |
| Lead | 6.38 µg/L 43% of the EPA limit 15 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2017
Highest in the city: 20 µg/L — DOUBLE HORN CREEK WSC · 448 people · 2017 | 10/10 | SYR4 |
| Monochloroacetic Acid | 18.105 µg/L No EPA limit set Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019 | 3/10 | SYR4 |
| Bromoform | 5.065 µg/L No EPA limit set Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 17.86 µg/L — CAPSTONE SUBDIVISION · 81 people · 2019 | 9/10 | SYR4 |
| Trichloroacetic Acid | 6.2 µg/L No EPA limit set Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 15.81 µg/L — CAPSTONE SUBDIVISION · 81 people · 2019 | 6/10 | SYR4 |
| Dibromoacetic Acid | 6 µg/L No EPA limit set Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 15.15 µg/L — VISTA DEL RIO · 126 people · 2019 | 9/10 | SYR4 |
| Selenium | 3.4 µg/L 6.8% of the EPA limit 50 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 9.105 µg/L — WILDERNESS COVE · 282 people · 2018 | 8/10 | SYR4 |
| Combined Uranium | 5.9 µg/L 20% of the EPA limit 30 µg/L Highest in the city: WILDERNESS COVE · 282 people · 2018 | 4/10 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.78 pCi/L 39% of the EPA limit 15 pCi/L Highest in the city: BERTRAM WOODS SUBDIVISION · 54 people · 2018 | 5/10 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2016
Highest in the city: 3.796 pCi/L — HIGH SIERRA WATER SYSTEM · 213 people · 2019 | 6/10 | SYR4 |
| Arsenic | 1.39 µg/L 14% of the EPA limit 10 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 3.065 µg/L — VISTA DEL RIO · 126 people · 2018 | 4/10 | SYR4 |
| Chromium | 2.38 µg/L 2.4% of the EPA limit 100 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 2.41 µg/L — DOUBLE HORN CREEK WSC · 448 people · 2019 | 3/10 | SYR4 |
| Monobromoacetic Acid | 1.19 µg/L No EPA limit set Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019
Highest in the city: 1.7 µg/L — CAPSTONE SUBDIVISION · 81 people · 2019 | 4/10 | SYR4 |
| Dalapon | 1.5 µg/L 0.8% of the EPA limit 200 µg/L Highest in the city: CAPSTONE SUBDIVISION · 81 people · 2019 | 1/10 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.6000 µg/L 10% of the EPA limit 6 µg/L Highest in the city: BERTRAM WOODS SUBDIVISION · 54 people · 2017 | 1/10 | SYR4 |
| Thallium, Total | 0.2440 µg/L 12% of the EPA limit 2 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019 | 1/10 | SYR4 |
| Simazine | 0.0700 µg/L 1.8% of the EPA limit 4 µg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2019 | 1/10 | SYR4 |
| Lead | 0.0018 mg/L 12% of the EPA limit 0.0150 mg/L Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2025
Highest in the city: 0.0094 mg/L — WILDERNESS COVE · 282 people · 2025 | 10/10 | LCR |
| Pfba | 0.0087 µg/L No EPA limit set Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2025 | 1/10 | UCMR-5 |
| 6:2 Fts | 0.0064 µg/L No EPA limit set Main supplier: CITY OF MARBLE FALLS · 8,059 people · 2025 | 1/10 | UCMR-5 |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Marble Falls
| Supplier | Population served |
|---|---|
| CITY OF MARBLE FALLS | 8,059 |
| DOUBLE HORN CREEK WSC | 448 |
| SPICEWOOD ESTATES | 372 |
| SUNSET HILLS SUBDIVISION | 324 |
| WILDERNESS COVE | 282 |
| HIGH SIERRA WATER SYSTEM | 213 |
| SKYLINE TERRACE SUBDIVISION | 153 |
| VISTA DEL RIO | 126 |
| CAPSTONE SUBDIVISION | 81 |
| BERTRAM WOODS SUBDIVISION | 54 |
Frequently asked questions about Marble Falls tap water
Is Marble Falls tap water safe to drink?
EPA testing detected 33 contaminants in the water serving Marble Falls. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Marble Falls?
10 public water suppliers report drinking-water monitoring for Marble Falls, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Marble Falls's water?
The contaminants EPA monitoring detected in Marble Falls include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.