What was found in Morgan Hill'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 | 6700 µg/L 67% of the EPA limit 10000 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019
Highest in the city: 8650 µg/L — FOOTHILL MUTUAL WATER COMPANY · 36 people · 2019 | 7/11 | SYR4 |
| Nitrate-Nitrite | 6410 µg/L 64% of the EPA limit 10000 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019
Highest in the city: 6600 µg/L — FOOTHILL MUTUAL WATER COMPANY · 36 people · 2016 | 5/11 | SYR4 |
| Lead | 1000 µg/L 6667% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019 | 1/11 | SYR4 |
| Barium | 161.4 µg/L 8.1% of the EPA limit 2000 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019
Highest in the city: 542 µg/L — GREEN ACRES MUTUAL WATER · 53 people · 2019 | 6/11 | SYR4 |
| Fluoride | 197.5 µg/L 4.9% of the EPA limit 4000 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019
Highest in the city: 455 µg/L — ROCKWOOD ESTATES MUTUAL WATER COMPANY · 30 people · 2017 | 8/11 | SYR4 |
| Nitrite | 400 µg/L 40% of the EPA limit 1000 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019 | 2/11 | SYR4 |
| Asbestos | 370 MFL 5286% of the EPA limit, at the 95th percentile of samples — 7 MFL Highest in the city: ROCKWOOD ESTATES MUTUAL WATER COMPANY · 30 people · 2017 | 2/11 | SYR4 |
| Chloroform | 39.24 µg/L No EPA limit set Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019 | 4/11 | SYR4 |
| Lithium | 25.5 µg/L No EPA limit set Main supplier: CITY OF MORGAN HILL · 47,374 people · 2024 | 1/11 | UCMR-5 |
| Chromium | 18 µg/L 18% of the EPA limit 100 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019 | 5/11 | SYR4 |
| TTHM | 13.702 µg/L 17% of the EPA limit 80 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019 | 7/11 | SYR4 |
| Copper | 11.4 µg/L 0.9% of the EPA limit 1300 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019 | 3/11 | SYR4 |
| Bromoform | 10.035 µg/L No EPA limit set Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019 | 5/11 | SYR4 |
| Antimony, Total | 9.505 µg/L 158% of the EPA limit, at the 95th percentile of samples — 6 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019 | 1/11 | SYR4 |
| Toluene | 9.105 µg/L 0.9% of the EPA limit 1000 µg/L Highest in the city: ROCKWOOD ESTATES MUTUAL WATER COMPANY · 30 people · 2019 | 1/11 | SYR4 |
| Dichloroacetic Acid | 4.7 µg/L No EPA limit set Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019 | 2/11 | SYR4 |
| Total Haloacetic Acids (HAA5) | 2.96 µg/L 4.9% of the EPA limit 60 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019
Highest in the city: 3.9 µg/L — THOUSAND TRAILS - MORGAN HILL · 413 people · 2019 | 3/11 | SYR4 |
| Bromodichloromethane | 2.02 µg/L No EPA limit set Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019
Highest in the city: 3.6 µg/L — GREEN ACRES MUTUAL WATER · 53 people · 2019 | 6/11 | SYR4 |
| Dibromochloromethane | 2.8845 µg/L No EPA limit set Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019
Highest in the city: 2.99 µg/L — THOUSAND TRAILS - MORGAN HILL · 413 people · 2019 | 7/11 | SYR4 |
| Dibromoacetic Acid | 2.8 µg/L No EPA limit set Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019 | 3/11 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019 | 2/11 | SYR4 |
| Selenium | 2 µg/L 4% of the EPA limit 50 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019 | 1/11 | SYR4 |
| Trichloroacetic Acid | 1.8 µg/L No EPA limit set Main supplier: CITY OF MORGAN HILL · 47,374 people · 2019 | 2/11 | SYR4 |
| Gross Beta Particle Activity | 1.0113 pCi/L No EPA limit set Main supplier: CITY OF MORGAN HILL · 47,374 people · 2018
Highest in the city: 1.36725 pCi/L — ROCKWOOD ESTATES MUTUAL WATER COMPANY · 30 people · 2018 | 2/11 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Highest in the city: SULLIVAN MUTUAL WATER · 53 people · 2019 | 2/11 | SYR4 |
| Combined Uranium | 0.5452 µg/L 1.8% of the EPA limit 30 µg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2018
Highest in the city: 0.7450 µg/L — SULLIVAN MUTUAL WATER · 53 people · 2017 | 2/11 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF MORGAN HILL · 47,374 people · 2024
Highest in the city: 0.0060 mg/L — GREEN MOUNTAIN WATER COMPANY · 80 people · 2025 | 9/11 | LCR |
| Pfpea | 0.0035 µg/L No EPA limit set Main supplier: CITY OF MORGAN HILL · 47,374 people · 2024 | 1/11 | UCMR-5 |
| Pfhxa | 0.0034 µg/L No EPA limit set Main supplier: CITY OF MORGAN HILL · 47,374 people · 2024 | 1/11 | UCMR-5 |
| PFHXS | 0.0033 µg/L No EPA limit set Main supplier: CITY OF MORGAN HILL · 47,374 people · 2024 | 1/11 | UCMR-5 |
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 Morgan Hill
| Supplier | Population served |
|---|---|
| CITY OF MORGAN HILL | 47,374 |
| THOUSAND TRAILS - MORGAN HILL | 413 |
| GREEN MOUNTAIN WATER COMPANY | 80 |
| UVAS PINES RV PARK | 65 |
| GREEN ACRES MUTUAL WATER | 53 |
| SULLIVAN MUTUAL WATER | 53 |
| STONEBRIDGE MUTUAL WATER CO | 38 |
| DEER HILL MUTUAL WATER CO | 36 |
| FOOTHILL MUTUAL WATER COMPANY | 36 |
| RANCHO DE LOMAS MUTUAL WATER COMPANY | 35 |
| ROCKWOOD ESTATES MUTUAL WATER COMPANY | 30 |
Frequently asked questions about Morgan Hill tap water
Is Morgan Hill tap water safe to drink?
EPA testing detected 30 contaminants in the water serving Morgan Hill. 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 Morgan Hill?
11 public water suppliers report drinking-water monitoring for Morgan Hill, California to the EPA. Each is listed above with its population served.
What contaminants are in Morgan Hill's water?
The contaminants EPA monitoring detected in Morgan Hill include Nitrate, Nitrate-Nitrite, Lead, Barium, Fluoride. 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.