What was found in Los Fresnos'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 |
|---|---|---|---|
| Fluoride | 486.5 µg/L 12% of the EPA limit 4000 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019 | 1/2 | SYR4 |
| Nitrate | 280 µg/L 2.8% of the EPA limit 10000 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019 | 1/2 | SYR4 |
| Copper | 202.3 µg/L 16% of the EPA limit 1300 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2017 | 2/2 | SYR4 |
| Barium | 145.45 µg/L 7.3% of the EPA limit 2000 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019 | 1/2 | SYR4 |
| Cyanide | 130 µg/L 65% of the EPA limit 200 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019 | 1/2 | SYR4 |
| TTHM | 19.17 µg/L 24% of the EPA limit 80 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019
Highest in the city: 52.73 µg/L — TOWN OF INDIAN LAKE · 888 people · 2019 | 2/2 | SYR4 |
| Lithium | 50.5 µg/L No EPA limit set Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2023 | 1/2 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 13.465 µg/L 22% of the EPA limit 60 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019
Highest in the city: 27.415 µg/L — TOWN OF INDIAN LAKE · 888 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 5.38 µg/L No EPA limit set Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019
Highest in the city: 16.91 µg/L — TOWN OF INDIAN LAKE · 888 people · 2019 | 2/2 | SYR4 |
| Bromoform | 6.96 µg/L No EPA limit set Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019
Highest in the city: 16.875 µg/L — TOWN OF INDIAN LAKE · 888 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 3.815 µg/L No EPA limit set Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019
Highest in the city: 14.065 µg/L — TOWN OF INDIAN LAKE · 888 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 4.37 µg/L No EPA limit set Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019
Highest in the city: 11.425 µg/L — TOWN OF INDIAN LAKE · 888 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 7.775 µg/L No EPA limit set Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019
Highest in the city: 11.3 µg/L — TOWN OF INDIAN LAKE · 888 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019
Highest in the city: 8.86 µg/L — TOWN OF INDIAN LAKE · 888 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 7.5 pCi/L No EPA limit set Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2017 | 1/2 | SYR4 |
| Chloroform | 2.95 µg/L No EPA limit set Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019
Highest in the city: 7 µg/L — TOWN OF INDIAN LAKE · 888 people · 2019 | 2/2 | SYR4 |
| Lead | 5.22 µg/L 35% of the EPA limit 15 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2017
Highest in the city: 5.695 µg/L — TOWN OF INDIAN LAKE · 888 people · 2019 | 2/2 | SYR4 |
| Selenium | 3.98 µg/L 8% of the EPA limit 50 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 3.7 µg/L No EPA limit set Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 2.025 µg/L No EPA limit set Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019
Highest in the city: 3.33 µg/L — TOWN OF INDIAN LAKE · 888 people · 2019 | 2/2 | SYR4 |
| Arsenic | 2.185 µg/L 22% of the EPA limit 10 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 1.9 µg/L 6.3% of the EPA limit 30 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2017 | 1/2 | SYR4 |
| Chromium | 1.58 µg/L 1.6% of the EPA limit 100 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019 | 1/2 | SYR4 |
| Thallium, Total | 0.5300 µg/L 27% of the EPA limit 2 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019 | 1/2 | SYR4 |
| Antimony, Total | 0.2760 µg/L 4.6% of the EPA limit 6 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019 | 1/2 | SYR4 |
| Atrazine | 0.1300 µg/L 4.3% of the EPA limit 3 µg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0018 mg/L 12% of the EPA limit 0.0150 mg/L Main supplier: CITY OF LOS FRESNOS · 6,009 people · 2023
Highest in the city: 0.0037 mg/L — TOWN OF INDIAN LAKE · 888 people · 2023 | 2/2 | LCR |
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 Los Fresnos
| Supplier | Population served |
|---|---|
| CITY OF LOS FRESNOS | 6,009 |
| TOWN OF INDIAN LAKE | 888 |
Frequently asked questions about Los Fresnos tap water
Is Los Fresnos tap water safe to drink?
EPA testing detected 27 contaminants in the water serving Los Fresnos. 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 Los Fresnos?
2 public water suppliers report drinking-water monitoring for Los Fresnos, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Los Fresnos's water?
The contaminants EPA monitoring detected in Los Fresnos include Fluoride, Nitrate, Copper, Barium, Cyanide. 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.