We have 117 parcels measured as septic in ZIP 85257 itself (Maricopa County, Arizona), out of 11,047 parcels in our records for this ZIP, of which 10,667 are recorded as on sewer.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| Maricopa County, Arizona | 100% | 223,158 | 103,791 | 1,420,870 |
Land-area overlap is from the 2020 Census Bureau ZCTA5-to-county relationship file, not an estimate of ours. Parcel and document counts are rows we hold, not a survey of every property in the ZIP. Last verified 2026-09-01.
We have measured 117 parcels as septic in ZIP 85257 itself, out of 11,047 parcels in our records for this ZIP.
ZIP 85257 falls in Maricopa County, Arizona.