A84/100
ESTERO MUNICIPAL IMPROVEMENT DISTRICT — Water Quality Report 2026
Serving 36,556 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA4110021
Violations
5
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2022 – September 30, 2022Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
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 ESTERO MUNICIPAL IMPROVEMENT DISTRICT
Is ESTERO MUNICIPAL IMPROVEMENT DISTRICT water safe to drink?
ESTERO MUNICIPAL IMPROVEMENT DISTRICT water receives a grade of A (84/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has ESTERO MUNICIPAL IMPROVEMENT DISTRICT detected?
69 contaminants were tested in ESTERO MUNICIPAL IMPROVEMENT DISTRICT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does ESTERO MUNICIPAL IMPROVEMENT DISTRICT have any EPA violations?
Yes, ESTERO MUNICIPAL IMPROVEMENT DISTRICT has 5 EPA violation(s) on record, with the most recent in 2022. Violation types include MR, MCL, TT. 2 are health-based violations.
How many people does ESTERO MUNICIPAL IMPROVEMENT DISTRICT serve?
ESTERO MUNICIPAL IMPROVEMENT DISTRICT serves approximately 36,556 people, California.
What type of water does ESTERO MUNICIPAL IMPROVEMENT DISTRICT provide?
ESTERO MUNICIPAL IMPROVEMENT DISTRICT sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA4110021.
How does ESTERO MUNICIPAL IMPROVEMENT DISTRICT compare to other utilities in California?
ESTERO MUNICIPAL IMPROVEMENT DISTRICT scores 84/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our California state page for a full comparison of water systems.