Mentone is unincorporated San Bernardino County, and many properties get water and sewer from the City of Redlands, which has served the Redlands and Mentone area for more than 90 years. Service can vary by parcel, and permits fall under the County. Call the number on this page to be connected with a local plumber in Mentone.

Local conditions in Mentone
Mentone is a foothill community east of Redlands on the south bank of the Santa Ana River. SR-38, running as Lugonia Avenue, Mentone Boulevard and Mill Creek Road, is its route into the San Bernardino Mountains, and its north-south streets are named for gemstones.
Water comes from the City of Redlands Municipal Utilities, which draws on Mill Creek water treated at the Tate plant, Santa Ana River water treated at the Hinckley plant north of Mentone, local wells in Redlands, Mentone and Yucaipa, and State Water Project water when needed. Because Mentone is in Redlands' eastern sphere of influence, the City extends water and sewer to individual unincorporated parcels case by case through LAFCO-approved out-of-agency service agreements. Not every property is on Redlands sewer, so confirm what a building is connected to before any drain or lateral work.
Mentone has no city building department, and the County office that issues plumbing permits depends on the job, so check with San Bernardino County before commercial work begins. A practical first step for any business here is the latest utility bill: a Redlands bill that includes sewer means the building drains to a public main, while a water-only bill is a sign to confirm how wastewater leaves the property.
Comparing service situations
| Question | Parcel served by Redlands | Parcel without Redlands service |
|---|---|---|
| Water | City of Redlands Municipal Utilities | Check the bill for the provider |
| Sewer | City of Redlands, where connected | May not be on municipal sewer |
| Cross-connection questions | Ask Redlands Municipal Utilities | Ask the provider on the bill |
| Permits | San Bernardino County | San Bernardino County |
Signs to watch for
- Pipes or assemblies split after a cold night
- Drains slowing across the building
- Low pressure or rusty water after a closure
- Wet ground along the line from the street
- Sewage odor outside the building
Seasonal notes
As a foothill community near the mountains, Mentone faces a real risk of frost on exposed lines, backflow assemblies and hose bibbs in winter, so insulate them before the cold arrives. Winter storms test roof drains and older laterals, and summer heat drives irrigation demand. Plan County permit time into larger projects.
Commercial Plumbing questions in Mentone
Is our address handled by the county instead of a city?
How do we confirm which water agency serves our commercial address?
What if our commercial property isn't on municipal sewer?
What should staff do if they smell gas at work?
More plumbing services in Mentone
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