ZIP 03103 falls in Hillsborough County, New Hampshire. We have not measured septic data for this county yet. The county page below has what we do know: where records are kept and whether the portal is public.
ZCTA 03103 is not entirely inside one county. Land-area share is from the 2020 Census ZCTA-to-county relationship file.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| Hillsborough County, New Hampshire | 97% | — | — | — |
| Rockingham County, New Hampshire | 3% | — | — | — |
4 businesses on record with an address in this ZIP: pumping, installation, design, inspection and repair. Not an endorsement, and we take no fee.
| Company | City | Phone | Rating |
|---|---|---|---|
| Allied Septic & Drain | Manchester | (603) 644-2283 | 5.0 (6) |
| AAA Pump Service & Fay Electric Motors | Manchester | (603) 645-8610 | 5.0 (1) |
| Dave's Septic Service | Manchester | (603) 668-3402 | 1.6 (27) |
| Drain Masters II | Manchester | (603) 222-9280 | — |
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 not measured septic-versus-sewer status for this county yet.
ZIP 03103 spans 2 counties: Hillsborough County, New Hampshire, Rockingham County, New Hampshire.