What was found in Lodi'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 | 270 µg/L 2.7% of the EPA limit 10000 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2018
Highest in the city: 680000 µg/L — LITTLE POTATO SLOUGH MUTUAL · 1,510 people · 2019 | 3/3 | SYR4 |
| Nitrate | 6400 µg/L 64% of the EPA limit 10000 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 3/3 | SYR4 |
| Fluoride | 212 µg/L 5.3% of the EPA limit 4000 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019
Highest in the city: 3900 µg/L — LITTLE POTATO SLOUGH MUTUAL · 1,510 people · 2019 | 3/3 | SYR4 |
| Nitrite | 442.336 µg/L 44% of the EPA limit 1000 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Barium | 196.5 µg/L 9.8% of the EPA limit 2000 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 18.05 µg/L 30% of the EPA limit 60 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019
Highest in the city: 117 µg/L — LITTLE POTATO SLOUGH MUTUAL · 1,510 people · 2019 | 2/3 | SYR4 |
| TTHM | 38 µg/L 48% of the EPA limit 80 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019
Highest in the city: 101.4 µg/L — LITTLE POTATO SLOUGH MUTUAL · 1,510 people · 2019 | 2/3 | SYR4 |
| Chloroform | 35.1 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2019
Highest in the city: 82.305 µg/L — LITTLE POTATO SLOUGH MUTUAL · 1,510 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 6.2 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2019
Highest in the city: 66.4 µg/L — LITTLE POTATO SLOUGH MUTUAL · 1,510 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 12 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2019
Highest in the city: 49.4 µg/L — LITTLE POTATO SLOUGH MUTUAL · 1,510 people · 2019 | 2/3 | SYR4 |
| Combined Uranium | 26.9988 µg/L 90% of the EPA limit 30 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Bromodichloromethane | 3.7 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2019
Highest in the city: 18.7 µg/L — LITTLE POTATO SLOUGH MUTUAL · 1,510 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 17.6 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2019 | 2/3 | SYR4 |
| Cyanide | 17 µg/L 8.5% of the EPA limit 200 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Arsenic | 8.705 µg/L 87% of the EPA limit 10 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 2/3 | SYR4 |
| Copper | 8.43 µg/L 0.6% of the EPA limit 1300 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Bromoform | 1.1 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2019
Highest in the city: 6.5 µg/L — LITTLE POTATO SLOUGH MUTUAL · 1,510 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 1.79 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2019
Highest in the city: 6.05 µg/L — LITTLE POTATO SLOUGH MUTUAL · 1,510 people · 2019 | 2/3 | SYR4 |
| Chromium | 5.8 µg/L 5.8% of the EPA limit 100 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019
Highest in the city: 6 µg/L — HAYNES BOARD & CARE HOME · 41 people · 2017 | 2/3 | SYR4 |
| Diquat | 5.62 µg/L 28% of the EPA limit 20 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.295 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2019
Highest in the city: 5.4 µg/L — LITTLE POTATO SLOUGH MUTUAL · 1,510 people · 2019 | 2/3 | SYR4 |
| Carbon Tetrachloride | 5.3 µg/L 106% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Trichloroethylene | 2.9 µg/L 58% of the EPA limit 5 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Selenium | 2.6 µg/L 5.2% of the EPA limit 50 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 3/3 | SYR4 |
| Tetrachloroethylene | 2.4 µg/L 48% of the EPA limit 5 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.5 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2019
Highest in the city: 2 µg/L — LITTLE POTATO SLOUGH MUTUAL · 1,510 people · 2019 | 2/3 | SYR4 |
| 1,1-Dichloroethylene | 0.8900 µg/L 13% of the EPA limit 7 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.6650 µg/L 333% of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Dichloromethane | 0.6100 µg/L 12% of the EPA limit 5 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Antimony, Total | 0.2042 µg/L 3.4% of the EPA limit 6 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Lead | 0.1590 µg/L 1.1% of the EPA limit 15 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019
Highest in the city: 0.2000 µg/L — LITTLE POTATO SLOUGH MUTUAL · 1,510 people · 2019 | 2/3 | SYR4 |
| Mercury | 0.1850 µg/L 9.3% of the EPA limit 2 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Ethylene Dibromide | 0.0692 µg/L 138% of the EPA limit, at the 95th percentile of samples — 0.0500 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Hexachlorocyclopentadiene | 0.0560 µg/L 0.1% of the EPA limit 50 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| Dinoseb | 0.0390 µg/L 0.6% of the EPA limit 7 µg/L Main supplier: LODI, CITY OF · 68,272 people · 2019 | 1/3 | SYR4 |
| PFBS | 0.0170 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2025 | 1/3 | UCMR-5 |
| PFOA | 0.0062 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2025 | 1/3 | UCMR-5 |
| PFHXS | 0.0061 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2025 | 1/3 | UCMR-5 |
| PFOS | 0.0056 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2025 | 1/3 | UCMR-5 |
| Pfpea | 0.0054 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2025 | 1/3 | UCMR-5 |
| Pfhxa | 0.0050 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2025 | 1/3 | UCMR-5 |
| Pfhpa | 0.0033 µg/L No EPA limit set Main supplier: LODI, CITY OF · 68,272 people · 2025 | 1/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: LODI, CITY OF · 68,272 people · 2024 | 3/3 | 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 Lodi
| Supplier | Population served |
|---|---|
| LODI, CITY OF | 68,272 |
| LITTLE POTATO SLOUGH MUTUAL | 1,510 |
| HAYNES BOARD & CARE HOME | 41 |
Frequently asked questions about Lodi tap water
Is Lodi tap water safe to drink?
EPA testing detected 43 contaminants in the water serving Lodi. 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 Lodi?
3 public water suppliers report drinking-water monitoring for Lodi, California to the EPA. Each is listed above with its population served.
What contaminants are in Lodi's water?
The contaminants EPA monitoring detected in Lodi include Nitrate-Nitrite, Nitrate, Fluoride, Nitrite, Barium. 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.