We have 501 parcels measured as septic in ZIP 85203 itself (Maricopa County, Arizona), out of 10,335 parcels in our records for this ZIP, of which 9,339 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 501 parcels as septic in ZIP 85203 itself, out of 10,335 parcels in our records for this ZIP.
ZIP 85203 falls in Maricopa County, Arizona.