Harris County Municipal Utility District 399
EPA ID: TX1013346 · 2,967 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Harris County Municipal Utility District 399 (TX1013346): no EPA violations recorded in the last five years. Five clean years on EPA record - Harris County Municipal Utility District 399, 2,967 residents served.
Data: EPA SDWIS
Service Area Map
Coverage area for Harris County Municipal Utility District 399 Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Harris County Municipal Utility District 399 serves a community with a median household income of $48,196 and an estimated 41,843 residents across its service area. Approximately 49% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 51% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Harris County Municipal Utility District 399's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Wastewater Proximity Note: This service area ranks in the 60th percentile nationally for proximity to wastewater discharge points.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 4 detections recorded.
Comparable Water Systems
Similar-sized systems in Texas
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Harris County Municipal Utility District 399 (EPA ID: TX1013346) is a community water system in Texas that serves approximately 2,967 people from groundwater sources.
This system serves ZIP code 77090 in Houston.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.000946 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by TX or modeled from parcel and building-footprint data.
- 77090 - Houston
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Harris County Municipal Utility District 399 (TX1013346) on EPA.gov.
Frequently Asked Questions
Is Harris County Municipal Utility District 399 water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Harris County Municipal Utility District 399 in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Harris County Municipal Utility District 399 serve?
Harris County Municipal Utility District 399 serves approximately 2,967 people across 1 ZIP code in Texas.
Where does Harris County Municipal Utility District 399 get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Harris County Municipal Utility District 399, TX. https://zipcheckup.com/water-system/tx1013346/
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