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F0/100

DEL ORO RIVER ISLAND SERV TERR #1 — Water Quality Report 2026

Serving 1,280 people · California

Water Source
Surface Water
County
—
System ID
CA5400665
Violations
104

Contaminant Test Results

1 contaminant above EPA health goals
ContaminantDetectedLimit (MCL)Status
Lead (90th percentile)
0.002 mg/L0.015 mg/LAbove Goal

EPA Violation History

16

Violations (last 5yr)

16

Unresolved

16

Health-Related

TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: April 1, 2024 – June 30, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved

Exceeded the Maximum Contaminant Level (single sample)

When: April 1, 2024 – June 30, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: October 1, 2023 – December 31, 2023Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved

Exceeded the Maximum Contaminant Level (single sample)

When: August 1, 2023 – August 31, 2023Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved

Exceeded the Maximum Contaminant Level (single sample)

When: July 1, 2023 – July 31, 2023Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: July 1, 2023 – September 30, 2023Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved

Exceeded the Maximum Contaminant Level (single sample)

When: June 1, 2023 – June 30, 2023Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: April 1, 2023 – June 30, 2023Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: January 1, 2023 – March 31, 2023Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: October 1, 2022 – December 31, 2022Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: July 1, 2022 – September 30, 2022Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: April 1, 2022 – June 30, 2022Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: January 1, 2022 – March 31, 2022Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: October 1, 2021 – December 31, 2021Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: July 1, 2021 – September 30, 2021Enforcement: Formal — state order issuedVerify on EPA.gov

Understanding violation severity

Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.

Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly

Frequently Asked Questions About DEL ORO RIVER ISLAND SERV TERR #1

Is DEL ORO RIVER ISLAND SERV TERR #1 water safe to drink?

DEL ORO RIVER ISLAND SERV TERR #1 water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 104 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has DEL ORO RIVER ISLAND SERV TERR #1 detected?

1 contaminants were tested in DEL ORO RIVER ISLAND SERV TERR #1's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).

Does DEL ORO RIVER ISLAND SERV TERR #1 have any EPA violations?

Yes, DEL ORO RIVER ISLAND SERV TERR #1 has 104 EPA violation(s) on record, with the most recent in 2024. Violation types include MCL, MR, Other. 88 are health-based violations.

How many people does DEL ORO RIVER ISLAND SERV TERR #1 serve?

DEL ORO RIVER ISLAND SERV TERR #1 serves approximately 1,280 people, California.

What type of water does DEL ORO RIVER ISLAND SERV TERR #1 provide?

DEL ORO RIVER ISLAND SERV TERR #1 sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA5400665.

How does DEL ORO RIVER ISLAND SERV TERR #1 compare to other utilities in California?

DEL ORO RIVER ISLAND SERV TERR #1 scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our California state page for a full comparison of water systems.