Humble
Plumbing and Septic in Humble, TX
A Humble mailing address can mean a house inside the city, a subdivision in a utility district, or an acre outside both, and which one decides whether septic is even part of the conversation.
In short
- Harris County
- ZIP 77338 covers most of Humble
- ZIP 77396 covers southern Humble
- Septic only outside the districts
What Could Be Read
Census counts for Humble could not be read for this build, so no population or house-age figures for the city are printed. What was read is that Community Impact's census coverage assigns ZIP 77338 to most of Humble and ZIP 77396 to southern Humble, and that the Lake Houston–Humble–Kingwood area as a whole grew from 285,668 to 320,106 between 2019 and 2024, up roughly 12%.
Source: Community Impact, Lake Houston–Humble–Kingwood edition, census coverage dated February 12, 2026, read November 1, 2026
The Address Is Not the Jurisdiction
The same Humble address can sit inside the city limits, inside a municipal utility district, or outside both. That decides who supplies sewer and who permits septic. Harris County's septic office covers property not within any city's limits, so a Humble house inside the city is not covered by that page at all.
Start with the bill: a sewer charge means a district or city carries the waste. The septic-or-sewer page lists the other checks.
Source: Harris County Office of the County Engineer, Wastewater FAQ (oce.harriscountytx.gov), read November 2, 2026
Which Trade to Call
Most Humble calls will be drains and sewer lines, water heaters and leaks. The outer, acreage edges that are on septic are served the same way as Huffman and Crosby, and the septic page covers it.
Humble address, not sure what you are on?
Call. The pro can usually tell from the street.