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Tap water quality report

Fallbrook, CA

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

2
water suppliers
58,773
people served
17
contaminants found
California rankings Lead in California PFAS in California

What was found in Fallbrook's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate-Nitrite
630000 µg/L 6300%
of the EPA limit, in the worst sample — 10000 µg/L
 1/2 SYR4
Nitrate
1988.8 µg/L 20%
of the EPA limit 10000 µg/L
 1/2 SYR4
Fluoride
310 µg/L 7.8%
of the EPA limit 4000 µg/L
 1/2 SYR4
Total Haloacetic Acids (HAA5)
94 µg/L 157%
of the EPA limit, in the worst sample — 60 µg/L
 2/2 SYR4
Monochloroacetic Acid
86 µg/L
No EPA limit set
 2/2 SYR4
TTHM
57 µg/L 71%
of the EPA limit 80 µg/L
 2/2 SYR4
Lithium
51.6 µg/L
No EPA limit set
 2/2 UCMR-5
Barium
48 µg/L 2.4%
of the EPA limit 2000 µg/L
 1/2 SYR4
Chloroform
28 µg/L
No EPA limit set
 2/2 SYR4
Dibromochloromethane
20 µg/L
No EPA limit set
 2/2 SYR4
Bromodichloromethane
19 µg/L
No EPA limit set
 2/2 SYR4
Dichloroacetic Acid
17 µg/L
No EPA limit set
 2/2 SYR4
Bromoform
10 µg/L
No EPA limit set
 2/2 SYR4
Trichloroacetic Acid
8.3 µg/L
No EPA limit set
 2/2 SYR4
Monobromoacetic Acid
7.8 µg/L
No EPA limit set
 2/2 SYR4
Dibromoacetic Acid
4.4 µg/L
No EPA limit set
 2/2 SYR4
Lead
0.0027 mg/L 18%
of the EPA limit 0.0150 mg/L
 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 single worst sample on record — 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 Fallbrook

SupplierPopulation served
FALLBROOK PUD 35,237
RAINBOW MUNICIPAL WD 23,536

Frequently asked questions about Fallbrook tap water

Is Fallbrook tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Fallbrook. 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 Fallbrook?

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

What contaminants are in Fallbrook's water?

The contaminants EPA monitoring detected in Fallbrook include Nitrate-Nitrite, Nitrate, Fluoride, Total Haloacetic Acids (HAA5), Monochloroacetic Acid. The full list, with the highest level found 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.