B76/100
HARRIS COUNTY WCID 21 — Water Quality Report 2026
Serving 13,845 people · Texas
Water Source
Purchased Surface Water
County
—
System ID
TX1010769
Violations
9
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2022 – August 29, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: April 3, 2022 – April 7, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: October 2, 2021 – April 7, 2025Rule: Ground Water RuleEnforcement: 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 HARRIS COUNTY WCID 21
Is HARRIS COUNTY WCID 21 water safe to drink?
HARRIS COUNTY WCID 21 water receives a grade of B (76/100), which is considered good. 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 WCID 21 detected?
31 contaminants were tested in HARRIS COUNTY WCID 21's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does HARRIS COUNTY WCID 21 have any EPA violations?
Yes, HARRIS COUNTY WCID 21 has 9 EPA violation(s) on record, with the most recent in 2022. Violation types include MR, Other, MCL. 3 are health-based violations.
How many people does HARRIS COUNTY WCID 21 serve?
HARRIS COUNTY WCID 21 serves approximately 13,845 people, Texas.
What type of water does HARRIS COUNTY WCID 21 provide?
HARRIS COUNTY WCID 21 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 TX1010769.
How does HARRIS COUNTY WCID 21 compare to other utilities in Texas?
HARRIS COUNTY WCID 21 scores 76/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Texas state page for a full comparison of water systems.