What was found in Julian'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 | 1554.88 µg/L 16% of the EPA limit 10000 µg/L Main supplier: CUYAMACA WATER DISTRICT · 2,923 people · 2019
Highest in the city: 12985 µg/L — YMCA CAMP MARSTON/RAINTREE · 338 people · 2019 | 8/9 | SYR4 |
| Fluoride | 395 µg/L 9.9% of the EPA limit 4000 µg/L Highest in the city: LA CIMA FIRE CENTER · 60 people · 2017 | 6/9 | SYR4 |
| Barium | 38.2 µg/L 1.9% of the EPA limit 2000 µg/L Main supplier: CUYAMACA WATER DISTRICT · 2,923 people · 2018
Highest in the city: 161.95 µg/L — JULIAN COMMUNITY SERVICES DISTRICT · 1,517 people · 2019 | 5/9 | SYR4 |
| Copper | 44 µg/L 3.4% of the EPA limit 1300 µg/L Main supplier: CUYAMACA WATER DISTRICT · 2,923 people · 2012
Highest in the city: 108.8 µg/L — LA CIMA FIRE CENTER · 60 people · 2017 | 5/9 | SYR4 |
| TTHM | 47.44 µg/L 59% of the EPA limit 80 µg/L Highest in the city: PINE HILLS MUTUAL WATER COMPANY · 760 people · 2019 | 4/9 | SYR4 |
| Cyanide | 30 µg/L 15% of the EPA limit 200 µg/L Highest in the city: PINE HILLS MUTUAL WATER COMPANY · 760 people · 2016 | 1/9 | SYR4 |
| Dibromochloromethane | 18.4 µg/L No EPA limit set Highest in the city: PINE HILLS MUTUAL WATER COMPANY · 760 people · 2019 | 4/9 | SYR4 |
| Arsenic | 17 µg/L 170% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: MAJESTIC PINES COMMUNITY SD · 1,768 people · 2019 | 3/9 | SYR4 |
| Bromodichloromethane | 14.03 µg/L No EPA limit set Highest in the city: PINE HILLS MUTUAL WATER COMPANY · 760 people · 2019 | 4/9 | SYR4 |
| Selenium | 13 µg/L 26% of the EPA limit 50 µg/L Highest in the city: YMCA CAMP MARSTON/RAINTREE · 338 people · 2017 | 1/9 | SYR4 |
| Total Haloacetic Acids (HAA5) | 10.55 µg/L 18% of the EPA limit 60 µg/L Highest in the city: PINE HILLS MUTUAL WATER COMPANY · 760 people · 2019 | 3/9 | SYR4 |
| Bromoform | 8.69 µg/L No EPA limit set Highest in the city: PINE HILLS MUTUAL WATER COMPANY · 760 people · 2019 | 4/9 | SYR4 |
| Chloroform | 6.32 µg/L No EPA limit set Highest in the city: PINE HILLS MUTUAL WATER COMPANY · 760 people · 2019 | 2/9 | SYR4 |
| Monochloroacetic Acid | 5.7 µg/L No EPA limit set Highest in the city: MAJESTIC PINES COMMUNITY SD · 1,768 people · 2019 | 1/9 | SYR4 |
| Dibromoacetic Acid | 5.5 µg/L No EPA limit set Highest in the city: PINE HILLS MUTUAL WATER COMPANY · 760 people · 2019 | 4/9 | SYR4 |
| Gross Beta Particle Activity | 3.6 pCi/L No EPA limit set Highest in the city: JULIAN COMMUNITY SERVICES DISTRICT · 1,517 people · 2015 | 1/9 | SYR4 |
| Dichloroacetic Acid | 3.38 µg/L No EPA limit set Highest in the city: PINE HILLS MUTUAL WATER COMPANY · 760 people · 2019 | 1/9 | SYR4 |
| Monobromoacetic Acid | 1.9 µg/L No EPA limit set Highest in the city: LA CIMA FIRE CENTER · 60 people · 2018 | 2/9 | SYR4 |
| Trichloroacetic Acid | 1.79 µg/L No EPA limit set Highest in the city: PINE HILLS MUTUAL WATER COMPANY · 760 people · 2019 | 1/9 | SYR4 |
| Toluene | 1.095 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the city: PINE HILLS MUTUAL WATER COMPANY · 760 people · 2019 | 1/9 | SYR4 |
| Combined Uranium | 0.8836 µg/L 2.9% of the EPA limit 30 µg/L Highest in the city: LA CIMA FIRE CENTER · 60 people · 2017 | 4/9 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CUYAMACA WATER DISTRICT · 2,923 people · 2026
Highest in the city: 0.0120 mg/L — CAMP STEVENS · 78 people · 2025 | 9/9 | 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 Julian
| Supplier | Population served |
|---|---|
| CUYAMACA WATER DISTRICT | 2,923 |
| MAJESTIC PINES COMMUNITY SD | 1,768 |
| JULIAN COMMUNITY SERVICES DISTRICT | 1,517 |
| PINE HILLS MUTUAL WATER COMPANY | 760 |
| YMCA CAMP MARSTON/RAINTREE | 338 |
| NORTH PEAK MUTUAL WATER COMPANY | 298 |
| CAMP STEVENS | 78 |
| LA CIMA FIRE CENTER | 60 |
| RICHARDSON BEARDSLEY PARK INC. | 28 |
Frequently asked questions about Julian tap water
Is Julian tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Julian. 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 Julian?
9 public water suppliers report drinking-water monitoring for Julian, California to the EPA. Each is listed above with its population served.
What contaminants are in Julian's water?
The contaminants EPA monitoring detected in Julian include Nitrate, Fluoride, Barium, 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.