A92/100
HARRIS COUNTY MUD 391 — Water Quality Report 2026
Serving 8,835 people · Texas
Water Source
Groundwater
County
—
System ID
TX1013253
Violations
5
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | < 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2006.
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 HARRIS COUNTY MUD 391
Is HARRIS COUNTY MUD 391 water safe to drink?
HARRIS COUNTY MUD 391 water receives a grade of A (92/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has HARRIS COUNTY MUD 391 detected?
31 contaminants were tested in HARRIS COUNTY MUD 391's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does HARRIS COUNTY MUD 391 have any EPA violations?
Yes, HARRIS COUNTY MUD 391 has 5 EPA violation(s) on record, with the most recent in 2006. Violation types include Other, MR.
How many people does HARRIS COUNTY MUD 391 serve?
HARRIS COUNTY MUD 391 serves approximately 8,835 people, Texas.
What type of water does HARRIS COUNTY MUD 391 provide?
HARRIS COUNTY MUD 391 sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is TX1013253.
How does HARRIS COUNTY MUD 391 compare to other utilities in Texas?
HARRIS COUNTY MUD 391 scores 92/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Texas state page for a full comparison of water systems.