Tap WaterIndex

← California

Tap water quality report

Loma Linda, CA

EPA monitoring detected 17 contaminants across the 2 water suppliers serving Loma Linda. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
40,497
people served
17
contaminants found
California rankings Lead in California PFAS in California

What was found in Loma Linda'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.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate-Nitrite
960000 µg/L 9600%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
Main supplier: LOMA LINDA, CITY OF · 25,129 people · 2019
2/2 SYR4
Nitrate
9040 µg/L 90%
of the EPA limit 10000 µg/L
Main supplier: LOMA LINDA, CITY OF · 25,129 people · 2019
2/2 SYR4
Fluoride
2600 µg/L 65%
of the EPA limit 4000 µg/L
Main supplier: LOMA LINDA, CITY OF · 25,129 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: LOMA LINDA, CITY OF · 25,129 people · 2019
1/2 SYR4
Combined Uranium
14.6765 µg/L 49%
of the EPA limit 30 µg/L
Main supplier: LOMA LINDA, CITY OF · 25,129 people · 2019
1/2 SYR4
Trichloroethylene
14 µg/L 280%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
Main supplier: LOMA LINDA, CITY OF · 25,129 people · 2019
1/2 SYR4
TTHM
4.52 µg/L 5.6%
of the EPA limit 80 µg/L
Main supplier: LOMA LINDA, CITY OF · 25,129 people · 2019
2/2 SYR4
Chromium
4.15 µg/L 4.2%
of the EPA limit 100 µg/L
Highest in the city: LOMA LINDA UNIVERSITY · 15,368 people · 2018
1/2 SYR4
Bromoform
2.65 µg/L
No EPA limit set
Main supplier: LOMA LINDA, CITY OF · 25,129 people · 2019
Highest in the city: 3.6 µg/L — LOMA LINDA UNIVERSITY · 15,368 people · 2018
2/2 SYR4
Dibromochloromethane
1.9 µg/L
No EPA limit set
Main supplier: LOMA LINDA, CITY OF · 25,129 people · 2019
1/2 SYR4
Mercury
1.5 µg/L 75%
of the EPA limit 2 µg/L
Main supplier: LOMA LINDA, CITY OF · 25,129 people · 2019
1/2 SYR4
Bromodichloromethane
1.1 µg/L
No EPA limit set
Main supplier: LOMA LINDA, CITY OF · 25,129 people · 2019
1/2 SYR4
1,1-Dichloroethylene
0.7725 µg/L 11%
of the EPA limit 7 µg/L
Main supplier: LOMA LINDA, CITY OF · 25,129 people · 2019
1/2 SYR4
1,2-DIBROMO-3-CHLOROPROPANE
0.2910 µg/L 145%
of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L
Main supplier: LOMA LINDA, CITY OF · 25,129 people · 2019
1/2 SYR4
PFOS
0.0042 µg/L
No EPA limit set
Highest in the city: LOMA LINDA UNIVERSITY · 15,368 people · 2023
1/2 UCMR-5
PFHXS
0.0031 µg/L
No EPA limit set
Highest in the city: LOMA LINDA UNIVERSITY · 15,368 people · 2023
1/2 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: LOMA LINDA, CITY OF · 25,129 people · 2026
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 Linda

SupplierPopulation served
LOMA LINDA, CITY OF 25,129
LOMA LINDA UNIVERSITY 15,368

Frequently asked questions about Loma Linda tap water

Is Loma Linda tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Loma Linda. 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 Linda?

2 public water suppliers report drinking-water monitoring for Loma Linda, California to the EPA. Each is listed above with its population served.

What contaminants are in Loma Linda's water?

The contaminants EPA monitoring detected in Loma Linda include Nitrate-Nitrite, Nitrate, Fluoride, Arsenic, Combined Uranium. 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.