In Weld County, Colorado, which covers part of Thornton, we have measured 16,587 parcels on septic and 75,750 on sewer. That is a county measurement. We do not hold a septic count for Thornton on its own and this page does not estimate one. Thornton also extends into Adams County, which are reported separately below and are not included in that figure.
Thornton is a city in Weld and Adams Counties, Colorado. The Census Bureau puts its internal point at 39.920433, -104.941413 and its land area at 36.52 square miles. Septic permitting and record keeping happen at the county level, not the city level, which is why every figure below is attributed to the county and linked back to the county page it came from.
| County | Records we hold | Parcels on septic | Parcels on sewer | County records portal | Searchable without an account |
|---|---|---|---|---|---|
| Weld County | 2,554 | 16,587 | 75,750 | county portal | no account needed |
| Adams County | 0 | 2,925 | 119,997 | county portal | account or login required |
Our collection for Weld County, Colorado is small, at 2,554 septic records. Treat it as a starting point for a Thornton property rather than a search that settles the question. The county is predominantly sewered: only 16,587 of 92,337 classified parcels are on septic. Septic properties near Thornton are the exception, which is exactly why owners often do not know they have one. The county publishes a records portal that we were able to search without creating an account, which makes checking a specific parcel something you can do yourself in a few minutes.
Septic is one subject with very different jobs inside it. These go straight to the page that does yours.
| If you are a | Go to | Because it covers |
|---|---|---|
| Homeowner | Septic pumping in Thornton | keeping the system you have working |
| Buyer or seller | Buying or selling in Thornton | what to pull and check before closing |
| Realtor | Buying or selling in Thornton | the same records a seller needs on file |
| Designer or engineer | Septic design in Thornton | design flow, tank capacity, dispersal sizing |
| Installer or contractor | Septic installation in Thornton | site evaluation, permit sequence, inspection |
| Septic pumper | Septic pumping in Thornton | tank access, lids and service interval |
| Inspector | Septic inspection in Thornton | what gets checked and what a failure means |
| Land investor | Septic installation in Thornton | whether raw land can take a system at all |
These are real businesses we hold an address for, not a ranked or paid list. We take no fee and list nobody preferentially. Confirm current licensing with your county or state before hiring.
With an address in Thornton itself
| Business | Town on file | Phone | Rating |
|---|---|---|---|
| Drain Brain | Thornton | (720) 322-4845 | 2.3 (12) |
| K & S Sewer And Drain | Thornton | (720) 989-5665 | 2.6 (5) |
| Plumbing Connect Systems | Thornton | (303) 945-6282 | — |
No. We measure septic and sewer at parcel level and roll it up by county. In Weld County, Colorado, which covers part of Thornton, we have measured 16,587 parcels on septic and 75,750 on sewer. That is a county measurement. We do not hold a septic count for Thornton on its own and this page does not estimate one. Thornton also extends into Adams County, which are reported separately below and are not included in that figure.
Thornton is in Weld and Adams Counties, Colorado.
From the Census ZCTA-to-place relationship file, with the share of Thornton’s land area that falls in each. A ZIP is not a place boundary and the two only ever partly agree, which is exactly why both pages exist.
Straight-line distance from the Census internal point of Thornton.
Parcel Perfect generates a code-shaped septic design and as-built style drawing for a parcel from the records and site data we hold, and shows every parcel we have classified as septic or sewer on one map. Both are open to use for any parcel in Weld and Adams Counties, Colorado.