What was found in Montebello'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 | 3335 µg/L 33% of the EPA limit 10000 µg/L Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2019 | 4/4 | SYR4 |
| Nitrate-Nitrite | 2000 µg/L 20% of the EPA limit 10000 µg/L Highest in the city: SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2018 | 2/4 | SYR4 |
| Fluoride | 363 µg/L 9.1% of the EPA limit 4000 µg/L Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2019
Highest in the city: 933 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2018 | 4/4 | SYR4 |
| Barium | 110 µg/L 5.5% of the EPA limit 2000 µg/L Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2019 | 1/4 | SYR4 |
| Lithium | 65.7 µg/L No EPA limit set Highest in the city: COMMERCE-CITY, WATER DEPT. · 4,205 people · 2024 | 3/4 | UCMR-5 |
| TTHM | 26.25 µg/L 33% of the EPA limit 80 µg/L Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2019
Highest in the city: 57.12 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 4/4 | SYR4 |
| Tetrachloroethylene | 1.4 µg/L 28% of the EPA limit 5 µg/L Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2019
Highest in the city: 31.679 µg/L — COMMERCE-CITY, WATER DEPT. · 4,205 people · 2019 | 2/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 4.33 µg/L 7.2% of the EPA limit 60 µg/L Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2019
Highest in the city: 26.3 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 4/4 | SYR4 |
| Chloroform | 1.29 µg/L No EPA limit set Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2019
Highest in the city: 22.3 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 3/4 | SYR4 |
| Trichloroethylene | 21.0645 µg/L 421% of the EPA limit, at the 95th percentile of samples — 5 µg/L Highest in the city: COMMERCE-CITY, WATER DEPT. · 4,205 people · 2019 | 1/4 | SYR4 |
| Dibromochloromethane | 10 µg/L No EPA limit set Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2019
Highest in the city: 17.9915 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 3.94 µg/L No EPA limit set Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2019
Highest in the city: 16.663 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 4/4 | SYR4 |
| Bromoform | 16 µg/L No EPA limit set Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 13 µg/L No EPA limit set Highest in the city: COMMERCE-CITY, WATER DEPT. · 4,205 people · 2019 | 2/4 | SYR4 |
| Trichloroacetic Acid | 8.115 µg/L No EPA limit set Highest in the city: SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 2/4 | SYR4 |
| Dibromoacetic Acid | 4.325 µg/L No EPA limit set Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2019
Highest in the city: 7.22 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 4/4 | SYR4 |
| Arsenic | 5.5 µg/L 55% of the EPA limit 10 µg/L Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2019
Highest in the city: 7.02 µg/L — SOUTH MONTEBELLO IRRIGATION DIST. · 15,021 people · 2019 | 3/4 | SYR4 |
| Monobromoacetic Acid | 6.8 µg/L No EPA limit set Highest in the city: SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 1/4 | SYR4 |
| Monochloroacetic Acid | 5.2 µg/L No EPA limit set Highest in the city: SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 1/4 | SYR4 |
| 1,1-Dichloroethylene | 3.793 µg/L 54% of the EPA limit 7 µg/L Highest in the city: COMMERCE-CITY, WATER DEPT. · 4,205 people · 2019 | 1/4 | SYR4 |
| Combined Uranium | 3.6952 µg/L 12% of the EPA limit 30 µg/L Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2017 | 2/4 | SYR4 |
| Dichloromethane | 0.6900 µg/L 14% of the EPA limit 5 µg/L Highest in the city: COMMERCE-CITY, WATER DEPT. · 4,205 people · 2019 | 1/4 | SYR4 |
| 1,1,2-Trichloroethane | 0.5100 µg/L 10% of the EPA limit 5 µg/L Highest in the city: COMMERCE-CITY, WATER DEPT. · 4,205 people · 2019 | 1/4 | SYR4 |
| PFOS | 0.0530 µg/L No EPA limit set Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2024 | 2/4 | UCMR-5 |
| Pfpea | 0.0092 µg/L No EPA limit set Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2024
Highest in the city: 0.0174 µg/L — COMMERCE-CITY, WATER DEPT. · 4,205 people · 2024 | 3/4 | UCMR-5 |
| PFOA | 0.0160 µg/L No EPA limit set Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2024 | 3/4 | UCMR-5 |
| Pfba | 0.0140 µg/L No EPA limit set Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2024 | 2/4 | UCMR-5 |
| Pfhxa | 0.0091 µg/L No EPA limit set Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2024
Highest in the city: 0.0136 µg/L — COMMERCE-CITY, WATER DEPT. · 4,205 people · 2024 | 3/4 | UCMR-5 |
| PFBS | 0.0110 µg/L No EPA limit set Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2024 | 3/4 | UCMR-5 |
| PFHXS | 0.0086 µg/L No EPA limit set Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2024 | 1/4 | UCMR-5 |
| Pfhpa | 0.0049 µg/L No EPA limit set Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2024
Highest in the city: 0.0051 µg/L — COMMERCE-CITY, WATER DEPT. · 4,205 people · 2024 | 2/4 | UCMR-5 |
| Pfda | 0.0037 µg/L No EPA limit set Highest in the city: SOUTH MONTEBELLO IRRIGATION DIST. · 15,021 people · 2024 | 1/4 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: MONTEBELLO LAND & WATER CO. · 26,554 people · 2026 | 4/4 | 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 Montebello
| Supplier | Population served |
|---|---|
| MONTEBELLO LAND & WATER CO. | 26,554 |
| SOUTH MONTEBELLO IRRIGATION DIST. | 15,021 |
| SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 | 7,330 |
| COMMERCE-CITY, WATER DEPT. | 4,205 |
Frequently asked questions about Montebello tap water
Is Montebello tap water safe to drink?
EPA testing detected 33 contaminants in the water serving Montebello. 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 Montebello?
4 public water suppliers report drinking-water monitoring for Montebello, California to the EPA. Each is listed above with its population served.
What contaminants are in Montebello's water?
The contaminants EPA monitoring detected in Montebello include Nitrate, Nitrate-Nitrite, Fluoride, Barium, Lithium. 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.