In Cassia County, Idaho, which covers Declo, we have measured 4,973 parcels on septic and 3,523 on sewer. That is a county measurement. We do not hold a septic count for Declo on its own and this page does not estimate one.
Declo is a city in Cassia County, Idaho. The Census Bureau puts its internal point at 42.519599, -113.628732 and its land area at 0.28 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 |
|---|---|---|---|---|---|
| Cassia County | 4,962 | 4,973 | 3,523 | county portal | no account needed |
Our collection for Cassia County, Idaho is small, at 4,962 septic records. Treat it as a starting point for a Declo property rather than a search that settles the question. The county is genuinely mixed: 4,973 of 8,496 classified parcels are on septic and the rest are sewered. Which side of that line a Declo address falls on is worth establishing before anything else. 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 |
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No. We measure septic and sewer at parcel level and roll it up by county. In Cassia County, Idaho, which covers Declo, we have measured 4,973 parcels on septic and 3,523 on sewer. That is a county measurement. We do not hold a septic count for Declo on its own and this page does not estimate one.
Declo is in Cassia County, Idaho.
From the Census ZCTA-to-place relationship file, with the share of Declo’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 Declo.
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 Cassia County, Idaho.