Septic systems in Harrah, OK
Harrah, east of OKC along the North Canadian River, requires homes inside city limits to connect to city services, so septic systems are mostly found on older lots and land outside the sewer area.
Local facts for Harrah
- All residents and businesses within city limits must connect to city services under Ordinance 17-217, per the utility policy revised Apr 16, 2026 (Harrah Utility Service Policy (Apr 16, 2026)). Utility office: 19625 NE 23rd St., (405) 454-2951.
- New sewer service needs a City plumbing permit, and modified private lines tied to city utilities must be inspected before backfill (Harrah Code 5-203).
- In new subdivisions, sanitary sewer is required where reasonably accessible (Harrah Code 12-429).
- About 71% of Oklahoma County land is rated very limited for septic absorption fields in USDA data (FoundationSoils, Oklahoma County (USDA SSURGO)).
- Lots platted before Jan 1, 1974 are exempt from DEQ minimum lot sizes, but new systems on them must meet current construction rules (252:641-1-3, DEQ rules, OAC 252:641).
Tip: If a Harrah home inside city limits is on septic, ask the City whether a sewer main is close before paying for a new tank.
State rules
DEQ rules apply across Oklahoma County: inspection before backfill, certified installers, and the 2-year aerobic maintenance rule (rules, aerobic guide). Local contact: City of Harrah.
Manufactured homes and septic in Harrah
About 10.6% of Harrah's housing units are mobile homes, the highest share of the cities in this guide (Census ACS 2020-2024 for Harrah, via Census Reporter). DEQ rules apply the same tank sizing to any residence: at least 1,000 gallons up to four bedrooms (OAC 252:641, DEQ on-site sewage rules).
New owners in Harrah
Harrah, on the eastern edge of Oklahoma County near the Pottawatomie County line, is small, about 6,684 people, and roughly half its householders arrived in 2014 or later (Census ACS 2020-2024 for Harrah, via Census Reporter). If you are one of them, the tank's last pumping date may be unknown; a pumping company can locate and open it. The median Harrah home was built in 1989, has 5.7 rooms and is valued near $225,400 (same source).
Local facts checked Oct 23, 2026.