Harris County Water & MUD Utility Guide
Water service in Harris County is fragmented across hundreds of Municipal Utility Districts (MUDs). Most MUD sites are outdated, but our guide simplifies the 2026 payment process.
Key Takeaways
- •You don't get to choose your water provider; it is determined by your specific Municipal Utility District (MUD).
- •Your exact MUD number can be found on your property tax bill or through the HCAD property search.
- •Water rates and tax rates vary significantly from one MUD to another based on neighborhood infrastructure.
How Do You Find Your Water Provider?
Finding your specific water provider can be confusing. Follow these 3 simple steps:
Check Your Records
Look at your property tax bill or search your address on the HCAD Property Search.
Find the Jurisdictions
Find the 'Jurisdictions' list and look for an entry ending in 'MUD' (e.g., HC MUD 123).
Find Your Portal
Use our links below to find your specific payment portal for your MUD.
The 'Big Three' Water Management Portals
Most Harris County MUDs are managed by one of these three major operating companies. Once you know your MUD number, check these portals to pay your bill:
OFFICIAL TCEQ RESOURCES • HARRIS COUNTY
Find your MUD water district — 3 ways
The Texas Commission on Environmental Quality (TCEQ) maintains three tools to identify your Municipal Utility District. Start with the map viewer — it’s the fastest for a home address.
Water Districts Map Viewer
Interactive map — click your address to see your district boundary highlighted in red. Links directly to district details in IWDD.
Open map viewerWater Districts Database (WDD)
Search by district name or number. Returns contact info, county location, service area maps, and TCEQ application status.
Search WDDIntegrated Water Districts Database (IWDD)
Detailed records — board contacts, financial disclosures, bond status, and rate history. Updated weekly by TCEQ.
Open IWDDHow to use the map viewer — step by step
Open the viewer
Go to tceq.texas.gov/gis/iwudview.html — the ArcGIS-powered map loads in your browser, no account needed.
Search your address
Use the search bar in the top-right corner. Type your full street address — e.g., 12345 Cypress Creek Pkwy, Houston TX — and press Enter to zoom to your property.
Click your location on the map
Click directly on your property pin. A popup appears showing the district name, number, and boundary — the district boundary is outlined in red on the map.
Get full district details
The popup links to the IWDD record for your district — showing board contact information, current operating status, and rate history. Note your district number for future reference.
Cross-check your tax bill
Compare the district number from TCEQ against the taxing unit listed on your HCAD property record. If they don’t match, contact iwud@tceq.texas.gov to report a discrepancy.
Can’t find your address? Zoom into your neighborhood manually using the map controls, then click your parcel. Alternatively, search the WDD database using your district name from your water bill — it appears as "MUD #___" or "Harris County MUD ___".