A95/100
NORTHWEST HARRIS COUNTY MUD 9 — Water Quality Report 2026
Serving 7,848 people · Texas
Water Source
Groundwater
County
—
System ID
TX1011599
Violations
2
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 2011.
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 NORTHWEST HARRIS COUNTY MUD 9
Is NORTHWEST HARRIS COUNTY MUD 9 water safe to drink?
NORTHWEST HARRIS COUNTY MUD 9 water receives a grade of A (95/100), 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 NORTHWEST HARRIS COUNTY MUD 9 detected?
31 contaminants were tested in NORTHWEST HARRIS COUNTY MUD 9's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does NORTHWEST HARRIS COUNTY MUD 9 have any EPA violations?
Yes, NORTHWEST HARRIS COUNTY MUD 9 has 2 EPA violation(s) on record, with the most recent in 2011. Violation types include MR.
How many people does NORTHWEST HARRIS COUNTY MUD 9 serve?
NORTHWEST HARRIS COUNTY MUD 9 serves approximately 7,848 people, Texas.
What type of water does NORTHWEST HARRIS COUNTY MUD 9 provide?
NORTHWEST HARRIS COUNTY MUD 9 sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is TX1011599.
How does NORTHWEST HARRIS COUNTY MUD 9 compare to other utilities in Texas?
NORTHWEST HARRIS COUNTY MUD 9 scores 95/100 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.