In Suffolk County, New York, which covers Islip, we have measured 355,991 parcels on septic and 108,182 on sewer. That is a county measurement. We do not hold a septic count for Islip on its own and this page does not estimate one.
Islip is a census-designated place in Suffolk County, New York. The Census Bureau puts its internal point at 40.730319, -73.216113 and its land area at 4.75 square miles. Septic permitting and record keeping happen at the county level, not the census-designated place 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 |
|---|---|---|---|---|---|
| Suffolk County | 64 | 355,991 | 108,182 | county portal | no account needed |
Our collection for Suffolk County, New York is small, at 64 septic records. Treat it as a starting point for a Islip property rather than a search that settles the question. Of the parcels we have classified in the county, most are on septic rather than sewer (355,991 of 464,173). A property near Islip is more likely than not to have its own system. 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 Islip | keeping the system you have working |
| Buyer or seller | Buying or selling in Islip | what to pull and check before closing |
| Realtor | Buying or selling in Islip | the same records a seller needs on file |
| Designer or engineer | Septic design in Islip | design flow, tank capacity, dispersal sizing |
| Septic pumper | Septic pumping in Islip | tank access, lids and service interval |
| Inspector | Septic inspection in Islip | what gets checked and what a failure means |
No. We measure septic and sewer at parcel level and roll it up by county. In Suffolk County, New York, which covers Islip, we have measured 355,991 parcels on septic and 108,182 on sewer. That is a county measurement. We do not hold a septic count for Islip on its own and this page does not estimate one.
Islip is in Suffolk County, New York.
From the Census ZCTA-to-place relationship file, with the share of Islip’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 Islip.
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 Suffolk County, New York.