Utilities guide

What can GIS tell you about septic, wells, and utilities on California land?

GIS can hint at sewer vs septic likelihood, water providers, and soils context—but perc tests, well yields, hookup fees, and shared-well agreements are not decided by a map click.

Updated 2026-08-29

Useful sources for searching: Official sources to verify buildability ↓

What public GIS is good for

Flagging whether a neighborhood is typically on public sewer vs septic.

Pointing to SSURGO soils that often correlate with drainage or septic friction.

Listing common water providers for a city/area when published.

What GIS cannot certify

Perc / OWTS approval or system size.

Well yield, water quality, or groundwater rights / SGMA constraints.

Hookup capacity, fees, or timeline from a utility.

Honest workflow

Start with a parcel Screen for hazards and soils context, then call environmental health and the water/sewer agency. Honesty here builds trust—and still moves buyers into a trial to see the lot-level picture.

People also ask

Can Parcel View tell me if septic will pass?

No. SSURGO and local notes are screening clues only. Environmental health and perc/design control the outcome.

Can I see if a parcel has a well on the map?

Sometimes well logs or local layers exist, but absence on a map means nothing. Confirm with sellers, title, and well records.

What should I screen first on raw land utilities?

Jurisdiction, sewer vs septic likelihood, water source options, power proximity, and hazard overlays that affect pad location—then agency calls.

Official sources

Last verified 2026-08-29. Re-check agency maps before decisions — vintages change.

Related

Screen this on a California parcel

Parcel View checks official public GIS for zoning, flood, fire, soils, and planning — every finding linked to the source.