Is Del Oro River Island Serv Terr #1 Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Private
Counties served: Tulare

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.

125

health-based violations

152

violations on file

still open

Violation	Type	Status	Period
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	2025-01-01 → 2025-03-31
MCL	Health-based	Archived	2024-10-01 → 2024-12-31
MCL	Health-based	Archived	2024-07-01 → 2024-09-30
MCL	Health-based	Archived	2024-04-01 → 2024-06-30
MCL	Health-based	Archived	2024-04-01 → 2024-06-30
MCL	Health-based	Archived	2024-04-01 → 2024-06-30

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	9516.3 µg/L 95% of the EPA limit 10000 µg/L worst single sample: 12100 µg/L	546/568	SYR4	2012–2019
Combined Uranium	70.903 µg/L 236% of the EPA limit, at the 95th percentile of samples — 30 µg/L worst single sample: 98.787 µg/L	163/164	SYR4	2012–2019
Arsenic	7.2485 µg/L 72% of the EPA limit 10 µg/L worst single sample: 12.89 µg/L	38/41	SYR4	2012–2019
Barium	126.65 µg/L 6.3% of the EPA limit 2000 µg/L worst single sample: 156.1 µg/L	34/38	SYR4	2012–2019
Fluoride	320 µg/L 8% of the EPA limit 4000 µg/L worst single sample: 400 µg/L	17/38	SYR4	2012–2019
Cadmium	7.725 µg/L 155% of the EPA limit, at the 95th percentile of samples — 5 µg/L worst single sample: 8.4 µg/L	16/54	SYR4	2012–2019
Nitrate-Nitrite	642500 µg/L 6425% of the EPA limit, at the 95th percentile of samples — 10000 µg/L worst single sample: 740000 µg/L	16/18	SYR4	2012–2018
Lead	0.0030 mg/L 20% of the EPA limit 0.0150 mg/L	15/15	LCR	2025
Thallium, Total	1.2365 µg/L 62% of the EPA limit 2 µg/L worst single sample: 1.25 µg/L	10/39	SYR4	2012–2019
Copper	2.89825 µg/L 0.2% of the EPA limit 1300 µg/L worst single sample: 3.031 µg/L	6/39	SYR4	2012–2019
Nitrite	307.5 µg/L 31% of the EPA limit 1000 µg/L worst single sample: 320 µg/L	6/41	SYR4	2012–2019
Selenium	1.2547 µg/L 2.5% of the EPA limit 50 µg/L worst single sample: 1.27 µg/L	4/39	SYR4	2012–2019
TTHM	8.85 µg/L 11% of the EPA limit 80 µg/L worst single sample: 9.3 µg/L	4/8	SYR4	2014–2019
Bromoform	3.85 µg/L No EPA limit set worst single sample: 3.9 µg/L	3/8	SYR4	2014–2019
Dibromochloromethane	4 µg/L No EPA limit set worst single sample: 4.2 µg/L	3/8	SYR4	2014–2019
Gross Beta Particle Activity	19.89 pCi/L No EPA limit set worst single sample: 21 pCi/L	3/10	SYR4	2016–2019
Beryllium, Total	3.48 µg/L 87% of the EPA limit 4 µg/L worst single sample: 3.6 µg/L	2/38	SYR4	2012–2019
Dibromoacetic Acid	1.595 µg/L No EPA limit set worst single sample: 1.6 µg/L	2/6	SYR4	2014–2019
Bromodichloromethane	1.7 µg/L No EPA limit set	1/8	SYR4	2014–2019
Chloroform	1 µg/L No EPA limit set	1/8	SYR4	2014–2019
Chromium	14 µg/L 14% of the EPA limit 100 µg/L	1/38	SYR4	2012–2019
Di(2-ethylhexyl) Phthalate	20 µg/L 333% of the EPA limit, at the 95th percentile of samples — 6 µg/L	1/9	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	1.6 µg/L 2.7% of the EPA limit 60 µg/L	1/6	SYR4	2014–2019

52 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-GammaBenzeneChlorobenzeneCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: FORTINO, ROBERT
Phone: 530-894-1100
Email: management@delorowater.com

Frequently asked questions about Del Oro River Island Serv Terr #1

Is Del Oro River Island Serv Terr #1 tap water safe to drink?

EPA monitoring detected 23 contaminants in Del Oro River Island Serv Terr #1'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 Del Oro River Island Serv Terr #1's water?

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

How many people does Del Oro River Island Serv Terr #1 serve?

Del Oro River Island Serv Terr #1 reports serving 1,280 people in California, per its EPA record.

Has Del Oro River Island Serv Terr #1 had any water quality violations?

The EPA has 152 violations on file for Del Oro River Island Serv Terr #1, of which 125 are health-based (a contaminant limit or required treatment was breached) and 0 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.