Municipal utility district · Harris County
Harris County MUD 457
On a typical Elyson home (about $436,411), Harris County MUD 457 adds about $6,179 a year to the tax bill, higher than most utility districts around Katy. Below: how to pay it, who to call, and what the district does.
Own a home in Katy? See what it would list for
- 1.41582025 tax rate per $100 of value
- $52.5Mbond debt outstanding, FY2025
- 2006year created
- 1,102acres
Pay & contact
Pay your MUD 457 bill or reach the district
- Pay or look up the MUD tax billUtility Tax Service · (713) 688-3855. Search by address or account number.
- Water, sewer or a service problemSi Environmental LLC · (832) 490-1600 (the district's operator, which runs the system and usually handles water billing)
- District websiteBoard meetings, notices, budgets and documents
- Check a specific addressHCAD lists every taxing district on a property's record
Contacts are as the district reported them to the Texas Comptroller (2026). The tax bill for county, school and other units comes separately from the Harris County Tax Office.
District facts
- Name
- Harris County MUD 457
- Type (TCEQ)
- MUD
- Created
- December 21, 2006
- Size
- 1,102 acres
- Status (TCEQ)
- Active
- TCEQ district ID
- 3737199
- HCAD jurisdiction code
- 376
- County
- Harris
MUD 457 tax rate
The 2025 adopted rate is 1.41580 per $100 of taxable value: 0.23080 for maintenance and operations and 1.18500 for debt service.
- Maintenance & operations
- Debt service
Rate by year
MUD 457 bond debt
Principal outstanding was $52,470,000 at the end of fiscal year 2025 (August 31), against a peak of $54,305,000 in FY2024.
Tax-supported and revenue principal outstanding at fiscal year end (Aug 31). As reported to the BRB; not independently verified.
Neighborhoods in MUD 457
Where these numbers come from
- Texas Bond Review BoardIssuer page: bonds and debt by year
- Harris County Tax OfficeAdopted and proposed rates (Truth in Taxation)
- TCEQ Water Districts (iWUD)Search Harris County MUD 457 for board, filings and boundaries
Sources: TCEQ Water Districts (iWUD) map service; Harris County Tax Office, Truth in Taxation rate summary. Retrieved Oct 9, 2026.
FAQ
MUD 457 FAQ
What is the Harris County MUD 457 tax rate?
The 2025 adopted rate is 1.41580 per $100 of taxable value, about $1,416 a year on $100,000 of taxable value.
How much debt does Harris County MUD 457 have?
$52,470,000 in bond principal outstanding at the end of FY2025, as reported to the Texas Bond Review Board.
What neighborhoods are in Harris County MUD 457?
Harris County MUD 457 serves homes in Elyson. Confirm a specific address on HCAD, where the district is listed among the account's taxing jurisdictions.
Spot an error in this data? Tell us and we'll fix it.
Tax rates, districts, schools and flood maps change. Tell us what's wrong and where you saw the right information, and we'll email you once it's corrected. We won't add you to any mailing list.
Selling a Home in a MUD?
We handle the MUD notice and explain the tax to buyers. Call (281) 606-0863 with questions.