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Tap water quality report

Rosario Park

EPA monitoring tested this supplier for 37 contaminants and detected 1. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

37
contaminants tested
1
detected
38
people served
12
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Private
Counties served
Santa Barbara

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.

12
health-based violations
15
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2005-02-01 → 2005-02-28
MCL Health-based Resolved 2005-02-01 → 2005-02-28
MCL Health-based Resolved 2004-11-01 → 2004-11-30
MCL Health-based Resolved 2004-11-01 → 2004-11-30
MCL Health-based Resolved 2004-04-01 → 2004-04-30
MCL Health-based Resolved 2004-04-01 → 2004-04-30
MCL Health-based Resolved 2002-09-01 → 2002-09-30
MCL Health-based Resolved 2002-09-01 → 2002-09-30
MCL Health-based Resolved 1999-06-01 → 1999-06-30
MCL Health-based Resolved 1999-06-01 → 1999-06-30

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 4/4 LCR 2024
36 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalArsenicBariumBenzeneBeryllium, TotalChlorobenzeneCopperCadmiumCarbon TetrachlorideChromiumDichloromethaneEthylbenzeneFluorideLeadMercuryNitrateNitrate-NitriteNitriteSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
FUNK, CHRIS
Phone
805-722-2017
Email
CHRIS.FUNK@GEOG.UCSB.EDU

Frequently asked questions about Rosario Park

Is Rosario Park tap water safe to drink?

EPA monitoring detected 1 contaminant in Rosario Park'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 Rosario Park's water?

EPA monitoring detected Lead. The full list with the level and data source for each is above.

How many people does Rosario Park serve?

Rosario Park reports serving 38 people in California, per its EPA record.

Has Rosario Park had any water quality violations?

The EPA has 15 violations on file for Rosario Park, of which 12 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.