What was found in Rosenberg'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 | 540 µg/L 5.4% of the EPA limit 10000 µg/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 1/2 | SYR4 |
| Fluoride | 524 µg/L 13% of the EPA limit 4000 µg/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2018 | 2/2 | SYR4 |
| Barium | 366.15 µg/L 18% of the EPA limit 2000 µg/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2018 | 2/2 | SYR4 |
| Nitrate-Nitrite | 287.5 µg/L 2.9% of the EPA limit 10000 µg/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 1/2 | SYR4 |
| Copper | 238.69999999999987 µg/L 18% of the EPA limit 1300 µg/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 1/2 | SYR4 |
| Lithium | 23.6 µg/L No EPA limit set Main supplier: CITY OF ROSENBERG · 43,158 people · 2025 | 1/2 | UCMR-5 |
| TTHM | 16.179999999999993 µg/L 20% of the EPA limit 80 µg/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 2/2 | SYR4 |
| Chloroform | 13.1 µg/L No EPA limit set Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 10.975 µg/L 18% of the EPA limit 60 µg/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 1/2 | SYR4 |
| Gross Beta Particle Activity | 8.48 pCi/L No EPA limit set Main supplier: CITY OF ROSENBERG · 43,158 people · 2017 | 1/2 | SYR4 |
| Dichloroacetic Acid | 7.3 µg/L No EPA limit set Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 7 µg/L No EPA limit set Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.755000000000001 pCi/L 32% of the EPA limit 15 pCi/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2017
Highest in the city: 5.5 pCi/L — SAKO PROPERTIES · 29 people · 2019 | 2/2 | SYR4 |
| Arsenic | 4.78 µg/L 48% of the EPA limit 10 µg/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2018 | 1/2 | SYR4 |
| Lead | 4.7 µg/L 31% of the EPA limit 15 µg/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 1/2 | SYR4 |
| Selenium | 3.3 µg/L 6.6% of the EPA limit 50 µg/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2018 | 1/2 | SYR4 |
| Dibromochloromethane | 2.9549999999999974 µg/L No EPA limit set Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 2.3 µg/L No EPA limit set Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 1.855 µg/L No EPA limit set Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2017 | 2/2 | SYR4 |
| Bromoform | 1.3699999999999999 µg/L No EPA limit set Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 1.1 µg/L 3.7% of the EPA limit 30 µg/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2017 | 1/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.6300 µg/L 11% of the EPA limit 6 µg/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2019 | 1/2 | SYR4 |
| Pfpea | 0.1320 µg/L No EPA limit set Main supplier: CITY OF ROSENBERG · 43,158 people · 2025 | 1/2 | UCMR-5 |
| Pfba | 0.0338 µg/L No EPA limit set Main supplier: CITY OF ROSENBERG · 43,158 people · 2025 | 1/2 | UCMR-5 |
| Pfhxa | 0.0060 µg/L No EPA limit set Main supplier: CITY OF ROSENBERG · 43,158 people · 2025 | 1/2 | UCMR-5 |
| PFBS | 0.0041 µg/L No EPA limit set Main supplier: CITY OF ROSENBERG · 43,158 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0025 mg/L 17% of the EPA limit 0.0150 mg/L Main supplier: CITY OF ROSENBERG · 43,158 people · 2023
Highest in the city: 0.0033 mg/L — SAKO PROPERTIES · 29 people · 2025 | 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 Rosenberg
| Supplier | Population served |
|---|---|
| CITY OF ROSENBERG | 43,158 |
| SAKO PROPERTIES | 29 |
Frequently asked questions about Rosenberg tap water
Is Rosenberg tap water safe to drink?
EPA testing detected 28 contaminants in the water serving Rosenberg. 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 Rosenberg?
2 public water suppliers report drinking-water monitoring for Rosenberg, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Rosenberg's water?
The contaminants EPA monitoring detected in Rosenberg include Nitrate, Fluoride, Barium, Nitrate-Nitrite, Copper. 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.