What was found in Quartz 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-Nitrite | 736000 µg/L 7360% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019 | 2/2 | SYR4 |
| Nitrate | 8814 µg/L 88% of the EPA limit 10000 µg/L Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019
Highest in the city: 10170 µg/L — PALM RANCH IRRIGATION DIST. · 5,507 people · 2019 | 2/2 | SYR4 |
| Fluoride | 816.4999999999999 µg/L 20% of the EPA limit 4000 µg/L Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019 | 2/2 | SYR4 |
| Barium | 109 µg/L 5.5% of the EPA limit 2000 µg/L Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019 | 1/2 | SYR4 |
| TTHM | 84.185 µg/L 105% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 37.56999999999999 µg/L No EPA limit set Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019 | 2/2 | SYR4 |
| Arsenic | 16.64999999999999 µg/L 166% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019
Highest in the city: 30 µg/L — PALM RANCH IRRIGATION DIST. · 5,507 people · 2019 | 2/2 | SYR4 |
| Bromoform | 28.894999999999996 µg/L No EPA limit set Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019 | 2/2 | SYR4 |
| Lithium | 28.1 µg/L No EPA limit set Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2025 | 2/2 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 19.739999999999984 µg/L 33% of the EPA limit 60 µg/L Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019
Highest in the city: 20.125 µg/L — PALM RANCH IRRIGATION DIST. · 5,507 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 19.81499999999999 µg/L No EPA limit set Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019 | 2/2 | SYR4 |
| Chloroform | 11.180000000000007 µg/L No EPA limit set Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019
Highest in the city: 17.41 µg/L — PALM RANCH IRRIGATION DIST. · 5,507 people · 2019 | 2/2 | SYR4 |
| Chromium | 15.399999999999999 µg/L 15% of the EPA limit 100 µg/L Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 13.839999999999995 µg/L No EPA limit set Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019 | 2/2 | SYR4 |
| Combined Uranium | 11.00365 µg/L 37% of the EPA limit 30 µg/L Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019 | 2/2 | SYR4 |
| Lead | 9.79 µg/L 65% of the EPA limit 15 µg/L Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 9.7 µg/L No EPA limit set Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 5.860000000000002 µg/L No EPA limit set Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019
Highest in the city: 6.069999999999999 µg/L — PALM RANCH IRRIGATION DIST. · 5,507 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 1.6500000000000001 µg/L No EPA limit set Main supplier: QUARTZ HILL WATER DIST. · 19,100 people · 2019 | 2/2 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: QUARTZ HILL WATER DIST. · 19,100 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 Quartz Hill
| Supplier | Population served |
|---|---|
| QUARTZ HILL WATER DIST. | 19,100 |
| PALM RANCH IRRIGATION DIST. | 5,507 |
Frequently asked questions about Quartz Hill tap water
Is Quartz Hill tap water safe to drink?
EPA testing detected 20 contaminants in the water serving Quartz 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 Quartz Hill?
2 public water suppliers report drinking-water monitoring for Quartz Hill, California to the EPA. Each is listed above with its population served.
What contaminants are in Quartz Hill's water?
The contaminants EPA monitoring detected in Quartz Hill include Nitrate-Nitrite, Nitrate, Fluoride, Barium, 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.