How to Check Sewer Availability
Direct answer: How can a Hawaiʻi Island homeowner check whether public sewer may be available, and what must be confirmed before planning a connection?
Start with the County wastewater map
Hawaiʻi County provides an online Wastewater records-and-maps application and published sewer network maps for areas including Hilo, Honokaʻa, Kailua-Kona, Kapehu Camp, Nāʻālehu, Pāhala, Paukaʻa-Pāpaʻikou, and Pepeʻekeo. Use the property address and TMK to orient yourself.
Look for nearby mains, laterals, manholes, service areas, or wastewater facilities. Save the map name and date you checked it.
A line on a map is only a screening result
An online map can show that infrastructure appears nearby, but it cannot by itself confirm that a parcel has a service lateral, available capacity, legal access, acceptable elevation, required easements, or permission to connect. GIS data may be generalized or outdated and is not a construction authorization.
Do not base a purchase, design, or construction contract solely on map distance.
Confirm with the County Wastewater Division
Contact the County of Hawaiʻi Department of Environmental Management, Wastewater Division with the full TMK, address, map reference, and a clear question about service availability. Ask whether the property is within a service area, whether a main and service lateral exist, and what application, fee, capacity, elevation, easement, plumbing, or inspection requirements apply.
If the answer is preliminary, ask what document or engineering review is needed for a final determination.
Check physical and legal feasibility
- Is there an existing lateral to the property, or would an extension be required?
- Can the building sewer reach the connection by gravity, or would pumping be needed?
- Are roads, neighboring parcels, easements, retaining walls, streams, or utilities in the route?
- Who owns and maintains each section of pipe?
- Are connection, capacity, inspection, or restoration fees required?
- Does the existing cesspool need specific closure documentation?
Compare sewer with an onsite replacement
If sewer is confirmed, a civil engineer or other authorized design professional can help compare the connection scope with an onsite IWS. If sewer is not available, Hawaiʻi DOH’s homeowner process begins with a licensed civil engineer who evaluates the property and prepares an IWS plan.
Nearby sewer can still be impractical if extension work, elevation, easements, or public improvements are substantial. Conversely, connection may avoid the long-term maintenance needs of an onsite treatment system. The comparison must be property-specific.
Keep the confirmation in the project file
Record who provided the information, the date, the property identifier, the map or drawing reviewed, and whether the response was preliminary or final. Keep any service-availability letter, application, capacity confirmation, connection drawing, fee estimate, and final inspection record with the property documents.
Official sources
- County of Hawaiʻi Wastewater records and maps
- County of Hawaiʻi sewer network maps
- County of Hawaiʻi Wastewater Division
- Hawaiʻi Department of Health Wastewater Branch — Individual Wastewater Systems
This article provides general homeowner information, not legal, engineering, real-estate, lending, or health advice. Property conditions and current agency requirements control. Hawaiʻi Cesspool Help coordinates between homeowners and licensed professionals and does not provide engineering services directly.