What was found in Loma Mar'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 | 475020 µg/L 4750% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 1/2 | SYR4 |
| Barium | 5330 µg/L 267% of the EPA limit, at the 95th percentile of samples — 2000 µg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 2/2 | SYR4 |
| Fluoride | 925 µg/L 23% of the EPA limit 4000 µg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 2/2 | SYR4 |
| Nitrite | 380.015 µg/L 38% of the EPA limit 1000 µg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 1/2 | SYR4 |
| TTHM | 118.525 µg/L 148% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019
Highest in the city: 229.06 µg/L — LOMA MAR MUTUAL · 65 people · 2019 | 2/2 | SYR4 |
| Nitrate | 100 µg/L 1% of the EPA limit 10000 µg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019
Highest in the city: 178.54 µg/L — LOMA MAR MUTUAL · 65 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 109.24 µg/L 182% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 32.207 µg/L No EPA limit set Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019
Highest in the city: 81.7 µg/L — LOMA MAR MUTUAL · 65 people · 2019 | 2/2 | SYR4 |
| Chloroform | 79.543 µg/L No EPA limit set Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 55.06 µg/L No EPA limit set Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 39.328 µg/L No EPA limit set Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019
Highest in the city: 53.2325 µg/L — LOMA MAR MUTUAL · 65 people · 2019 | 2/2 | SYR4 |
| Bromoform | 4.503 µg/L No EPA limit set Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019
Highest in the city: 50.1 µg/L — LOMA MAR MUTUAL · 65 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 48.92 µg/L No EPA limit set Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 2/2 | SYR4 |
| Arsenic | 20 µg/L 200% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 9.075 µg/L No EPA limit set Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019
Highest in the city: 15.815 µg/L — LOMA MAR MUTUAL · 65 people · 2019 | 2/2 | SYR4 |
| Chromium | 7.7 µg/L 7.7% of the EPA limit 100 µg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 7.2 µg/L No EPA limit set Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 2/2 | SYR4 |
| Lead | 7 µg/L 47% of the EPA limit 15 µg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 1/2 | SYR4 |
| Copper | 4 µg/L 0.3% of the EPA limit 1300 µg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 2/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 2.18 µg/L 36% of the EPA limit 6 µg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.4 µg/L No EPA limit set Highest in the city: LOMA MAR MUTUAL · 65 people · 2019 | 1/2 | SYR4 |
| Di(2-ethylhexyl) Adipate | 0.2400 µg/L 0.1% of the EPA limit 400 µg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0028 mg/L 19% of the EPA limit 0.0150 mg/L Main supplier: REDWOOD GLEN CAMP & CONFERENCE CTR · 114 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 Loma Mar
| Supplier | Population served |
|---|---|
| REDWOOD GLEN CAMP & CONFERENCE CTR | 114 |
| LOMA MAR MUTUAL | 65 |
Frequently asked questions about Loma Mar tap water
Is Loma Mar tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Loma Mar. 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 Loma Mar?
2 public water suppliers report drinking-water monitoring for Loma Mar, California to the EPA. Each is listed above with its population served.
What contaminants are in Loma Mar's water?
The contaminants EPA monitoring detected in Loma Mar include Nitrate-Nitrite, Barium, Fluoride, Nitrite, 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.