Tap WaterIndex

← California

Tap water quality report

Littlerock, CA

EPA monitoring detected 14 contaminants across the 1 water supplier serving Littlerock. 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.

1
water supplier
3,040
people served
14
contaminants found
California rankings Lead in California PFAS in California

What was found in Littlerock'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
672919.9999999999 µg/L 6729%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2017
1/1 SYR4
Nitrate
4800 µg/L 48%
of the EPA limit 10000 µg/L
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2019
1/1 SYR4
Fluoride
213 µg/L 5.3%
of the EPA limit 4000 µg/L
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2017
1/1 SYR4
TTHM
11.649999999999995 µg/L 15%
of the EPA limit 80 µg/L
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2019
1/1 SYR4
Dibromoacetic Acid
7.029999999999999 µg/L
No EPA limit set
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2019
1/1 SYR4
Combined Uranium
6.377199999999999 µg/L 21%
of the EPA limit 30 µg/L
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
6.15 µg/L 10%
of the EPA limit 60 µg/L
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2019
1/1 SYR4
Dibromochloromethane
4.514999999999999 µg/L
No EPA limit set
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2019
1/1 SYR4
Bromodichloromethane
3.259999999999999 µg/L
No EPA limit set
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2019
1/1 SYR4
Bromoform
3.0799999999999983 µg/L
No EPA limit set
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2019
1/1 SYR4
Chloroform
2.1 µg/L
No EPA limit set
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2019
1/1 SYR4
Dichloroacetic Acid
1.3199999999999996 µg/L
No EPA limit set
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2019
1/1 SYR4
Monobromoacetic Acid
1 µg/L
No EPA limit set
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2019
1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: LITTLEROCK CREEK IRRIGATION DIST. · 3,040 people · 2025
1/1 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 Littlerock

SupplierPopulation served
LITTLEROCK CREEK IRRIGATION DIST. 3,040

Frequently asked questions about Littlerock tap water

Is Littlerock tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Littlerock. 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 Littlerock?

1 public water supplier report drinking-water monitoring for Littlerock, California to the EPA. Each is listed above with its population served.

What contaminants are in Littlerock's water?

The contaminants EPA monitoring detected in Littlerock include Nitrate-Nitrite, Nitrate, Fluoride, TTHM, Dibromoacetic Acid. 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.