What was found in Upland'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-Nitrite | 21000 µg/L 210% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: UPLAND, CITY OF · 78,376 people · 2019
Highest in the city: 830000 µg/L — WATER FACILITIES AUTHORITY-JPA · 0 people · 2019 | 4/4 | SYR4 |
| Nitrate | 21470 µg/L 215% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: UPLAND, CITY OF · 78,376 people · 2019 | 4/4 | SYR4 |
| Fluoride | 420 µg/L 11% of the EPA limit 4000 µg/L Main supplier: UPLAND, CITY OF · 78,376 people · 2019
Highest in the city: 589.9999999999999 µg/L — SAN ANTONIO WATER COMPANY · 3,441 people · 2019 | 4/4 | SYR4 |
| Copper | 380 µg/L 29% of the EPA limit 1300 µg/L Main supplier: UPLAND, CITY OF · 78,376 people · 2019 | 2/4 | SYR4 |
| TTHM | 71 µg/L 89% of the EPA limit 80 µg/L Main supplier: UPLAND, CITY OF · 78,376 people · 2019
Highest in the city: 72 µg/L — WATER FACILITIES AUTHORITY-JPA · 0 people · 2019 | 3/4 | SYR4 |
| Bromoform | 25 µg/L No EPA limit set Main supplier: UPLAND, CITY OF · 78,376 people · 2019
Highest in the city: 30 µg/L — WATER FACILITIES AUTHORITY-JPA · 0 people · 2019 | 2/4 | SYR4 |
| Dibromochloromethane | 28 µg/L No EPA limit set Main supplier: UPLAND, CITY OF · 78,376 people · 2019 | 3/4 | SYR4 |
| Chloroform | 15 µg/L No EPA limit set Main supplier: UPLAND, CITY OF · 78,376 people · 2019
Highest in the city: 26.599999999999966 µg/L — WATER FACILITIES AUTHORITY-JPA · 0 people · 2019 | 3/4 | SYR4 |
| Bromodichloromethane | 19 µg/L No EPA limit set Main supplier: UPLAND, CITY OF · 78,376 people · 2019 | 3/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 16.94999999999999 µg/L 28% of the EPA limit 60 µg/L Main supplier: UPLAND, CITY OF · 78,376 people · 2019 | 3/4 | SYR4 |
| Tetrachloroethylene | 14 µg/L 280% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: UPLAND, CITY OF · 78,376 people · 2019 | 1/4 | SYR4 |
| Combined Uranium | 8.1205 µg/L 27% of the EPA limit 30 µg/L Main supplier: UPLAND, CITY OF · 78,376 people · 2017
Highest in the city: 9.476399999999996 µg/L — SAN ANTONIO WATER COMPANY · 3,441 people · 2013 | 3/4 | SYR4 |
| Gross Beta Particle Activity | 9.24 pCi/L No EPA limit set Main supplier: UPLAND, CITY OF · 78,376 people · 2017 | 1/4 | SYR4 |
| Trichloroacetic Acid | 8.459999999999999 µg/L No EPA limit set Main supplier: UPLAND, CITY OF · 78,376 people · 2019 | 2/4 | SYR4 |
| Dibromoacetic Acid | 7.5 µg/L No EPA limit set Main supplier: UPLAND, CITY OF · 78,376 people · 2019 | 2/4 | SYR4 |
| Dichloroacetic Acid | 7.2 µg/L No EPA limit set Main supplier: UPLAND, CITY OF · 78,376 people · 2019 | 3/4 | SYR4 |
| Monochloroacetic Acid | 5.6 µg/L No EPA limit set Highest in the city: WATER FACILITIES AUTHORITY-JPA · 0 people · 2019 | 1/4 | SYR4 |
| Arsenic | 4.6049999999999995 µg/L 46% of the EPA limit 10 µg/L Main supplier: UPLAND, CITY OF · 78,376 people · 2019
Highest in the city: 4.9399999999999995 µg/L — SAN ANTONIO WATER COMPANY · 3,441 people · 2019 | 3/4 | SYR4 |
| Trichloroethylene | 2.13 µg/L 43% of the EPA limit 5 µg/L Main supplier: UPLAND, CITY OF · 78,376 people · 2019 | 1/4 | SYR4 |
| Monobromoacetic Acid | 1.6 µg/L No EPA limit set Main supplier: UPLAND, CITY OF · 78,376 people · 2019
Highest in the city: 1.875 µg/L — WATER FACILITIES AUTHORITY-JPA · 0 people · 2019 | 2/4 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.2600 µg/L 130% of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L Main supplier: UPLAND, CITY OF · 78,376 people · 2019
Highest in the city: 0.2640 µg/L — SAN ANTONIO WATER COMPANY · 3,441 people · 2019 | 2/4 | SYR4 |
| Pfpea | 0.0057 µg/L No EPA limit set Main supplier: UPLAND, CITY OF · 78,376 people · 2025 | 1/4 | UCMR-5 |
| Pfhxa | 0.0055 µg/L No EPA limit set Main supplier: UPLAND, CITY OF · 78,376 people · 2025 | 1/4 | UCMR-5 |
| PFBS | 0.0030 µg/L No EPA limit set Main supplier: UPLAND, CITY OF · 78,376 people · 2025 | 1/4 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: UPLAND, CITY OF · 78,376 people · 2023 | 2/4 | 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 Upland
| Supplier | Population served |
|---|---|
| UPLAND, CITY OF | 78,376 |
| SAN ANTONIO WATER COMPANY | 3,441 |
| WATER FACILITIES AUTHORITY-JPA | 0 |
| WEST END CONSOLIDATED WATER COMPANY | 0 |
Frequently asked questions about Upland tap water
Is Upland tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Upland. 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 Upland?
4 public water suppliers report drinking-water monitoring for Upland, California to the EPA. Each is listed above with its population served.
What contaminants are in Upland's water?
The contaminants EPA monitoring detected in Upland include Nitrate-Nitrite, Nitrate, Fluoride, Copper, TTHM. 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.