What was found in Mont Belvieu'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 | 2555.5 µg/L 64% of the EPA limit 4000 µg/L Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 2/2 | SYR4 |
| Copper | 228.7 µg/L 18% of the EPA limit 1300 µg/L Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019
Highest in the city: 1455 µg/L — OLSEN ESTATES WATER SYSTEM · 174 people · 2019 | 2/2 | SYR4 |
| Barium | 118.2 µg/L 5.9% of the EPA limit 2000 µg/L Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019
Highest in the city: 232.7 µg/L — OLSEN ESTATES WATER SYSTEM · 174 people · 2019 | 2/2 | SYR4 |
| TTHM | 71.8 µg/L 90% of the EPA limit 80 µg/L Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 34.2 µg/L No EPA limit set Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 27.4 µg/L No EPA limit set Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 2/2 | SYR4 |
| Lithium | 26.7 µg/L No EPA limit set Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2025 | 1/2 | UCMR-5 |
| Chloroform | 16 µg/L No EPA limit set Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 2/2 | SYR4 |
| Bromoform | 15.98 µg/L No EPA limit set Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 15.62 µg/L 26% of the EPA limit 60 µg/L Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 2/2 | SYR4 |
| Lead | 12.42 µg/L 83% of the EPA limit 15 µg/L Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 2/2 | SYR4 |
| Nitrate | 10 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 10 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2015 | 2/2 | SYR4 |
| Dibromoacetic Acid | 7.94 µg/L No EPA limit set Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 2/2 | SYR4 |
| Arsenic | 5.57 µg/L 56% of the EPA limit 10 µg/L Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 4.8 µg/L No EPA limit set Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 4.58 µg/L No EPA limit set Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 4.2 pCi/L No EPA limit set Highest in the city: OLSEN ESTATES WATER SYSTEM · 174 people · 2014 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4 pCi/L 27% of the EPA limit 15 pCi/L Highest in the city: OLSEN ESTATES WATER SYSTEM · 174 people · 2014 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2015
Highest in the city: 2 pCi/L — OLSEN ESTATES WATER SYSTEM · 174 people · 2014 | 2/2 | SYR4 |
| Xylenes, Total | 1.1 µg/L 0% of the EPA limit 10000 µg/L Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2019 | 2/2 | SYR4 |
| Toluene | 0.7000 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the city: OLSEN ESTATES WATER SYSTEM · 174 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0025 mg/L 17% of the EPA limit 0.0150 mg/L Main supplier: CITY OF MONT BELVIEU · 12,864 people · 2026 | 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 Mont Belvieu
| Supplier | Population served |
|---|---|
| CITY OF MONT BELVIEU | 12,864 |
| OLSEN ESTATES WATER SYSTEM | 174 |
Frequently asked questions about Mont Belvieu tap water
Is Mont Belvieu tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Mont Belvieu. 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 Mont Belvieu?
2 public water suppliers report drinking-water monitoring for Mont Belvieu, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Mont Belvieu's water?
The contaminants EPA monitoring detected in Mont Belvieu include Fluoride, Copper, Barium, TTHM, Dibromochloromethane. 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.