B76/100
CASTLE AIRPORT — Water Quality Report 2026
Serving 1,650 people · California
Water Source
Groundwater
County
—
System ID
CA2410700
Violations
9
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.007 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
2
Unresolved
1
Health-Related
TIER 3Unresolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 2Unresolved
Treatment technique violation
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2021 – October 31, 2021Rule: Total Coliform RuleEnforcement: Formal — state order issued
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 CASTLE AIRPORT
Is CASTLE AIRPORT water safe to drink?
CASTLE AIRPORT water receives a grade of B (76/100), which is considered good. Out of 1 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CASTLE AIRPORT detected?
1 contaminants were tested in CASTLE AIRPORT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CASTLE AIRPORT have any EPA violations?
Yes, CASTLE AIRPORT has 9 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, MON. 3 are health-based violations.
How many people does CASTLE AIRPORT serve?
CASTLE AIRPORT serves approximately 1,650 people, California.
What type of water does CASTLE AIRPORT provide?
CASTLE AIRPORT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA2410700.
How does CASTLE AIRPORT compare to other utilities in California?
CASTLE AIRPORT scores 76/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our California state page for a full comparison of water systems.