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Tap water quality report

Knoll Enterprises

EPA monitoring tested this supplier for 67 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

67
contaminants tested
9
detected
500
people served
86
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Private
Counties served
San Bernardino

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

86
health-based violations
124
violations on file
3
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2026-01-01 → 2026-03-31
MCL Health-based Archived 2026-01-01 → 2026-03-31
MCL Health-based Archived 2025-10-01 → 2025-12-31
MCL Health-based Archived 2025-10-01 → 2025-12-31
MCL Health-based Archived 2025-07-01 → 2025-09-30
MCL Health-based Archived 2025-07-01 → 2025-09-30
MCL Health-based Archived 2025-04-01 → 2025-06-30
MCL Health-based Archived 2025-04-01 → 2025-06-30
MCL Health-based Archived 2025-01-01 → 2025-03-31
MCL Health-based Archived 2025-01-01 → 2025-03-31

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Arsenic
61 µg/L 610%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 82 µg/L
40/40 SYR4 2015–2019
Combined Uranium
85.5558 µg/L 285%
of the EPA limit, at the 95th percentile of samples — 30 µg/L
worst single sample: 113.091 µg/L
38/40 SYR4 2014–2019
Nitrate
6925 µg/L 69%
of the EPA limit 10000 µg/L
worst single sample: 7100 µg/L
28/36 SYR4 2015–2019
Fluoride
1820 µg/L 46%
of the EPA limit 4000 µg/L
worst single sample: 1900 µg/L
17/17 SYR4 2015–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 4/4 LCR 2024
Mercury
2.365 µg/L 118%
of the EPA limit, at the 95th percentile of samples — 2 µg/L
worst single sample: 2.5 µg/L
4/8 SYR4 2015–2019
Nitrate-Nitrite
6350 µg/L 64%
of the EPA limit 10000 µg/L
worst single sample: 6600 µg/L
3/4 SYR4 2015–2019
Lead
7.8 µg/L 52%
of the EPA limit 15 µg/L
 1/4 SYR4 2015–2019
Toluene
0.5000 µg/L 0.1%
of the EPA limit 1000 µg/L
 1/3 SYR4 2015–2018
58 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
LIVINGSTON, KRISTIE
Phone
760-733-4239
Email
knoll4239@gmail.com

Frequently asked questions about Knoll Enterprises

Is Knoll Enterprises tap water safe to drink?

EPA monitoring detected 9 contaminants in Knoll Enterprises's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Knoll Enterprises's water?

EPA monitoring detected Arsenic, Combined Uranium, Nitrate, Fluoride, Lead, and others. The full list with the level and data source for each is above.

How many people does Knoll Enterprises serve?

Knoll Enterprises reports serving 500 people in California, per its EPA record.

Has Knoll Enterprises had any water quality violations?

The EPA has 124 violations on file for Knoll Enterprises, of which 86 are health-based (a contaminant limit or required treatment was breached) and 3 remain open. The rest are monitoring or reporting failures.

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.