CAPP Construction

The Carpinteria Valley Water District (CVWD) and Carpinteria Sanitary District are hard at work building the Carpinteria Advanced Purification Project (CAPP). CVWD is coordinating closely with neighbors and the City to lessen disruptions, and printed public notices are being delivered to all those within the impacted areas. The follow information has been updated as of Thursday, September 17, 2026.

Pipeline

Construction is currently taking place on the corner of Maple Street (Segment 11 of the map below) from 7 a.m. to 5 p.m. installing an underground pipeline.

Advanced Water Purification Facility

Crews are performing earthwork activities at the Carpinteria Sanitary District Wastewater Treatment Plant, setting a strong foundation for the new Advanced Water Purification Facility.

The new facility will use a multi-step treatment process including membrane filtration, reverse osmosis, and ultraviolet/advanced oxidation to produce water that meets or exceeds all state and federal drinking water standards.

Injection and Monitoring Wells

On Sept. 9, 2026, CVWD awarded Pacific Coast Well Drilling, Inc. the contract for construction of two groundwater injection wells and two sets of three monitoring wells.

The new injection wells will send the purified water underground to help refill local groundwater supplies. The wells are planned for construction at St. Joseph’s Catholic Church on Linden Ave and the end of Meadow View Lane. Construction is expected to begin in December 2026 at the St. Joseph’s Catholic Church site and in February on Meadow View Lane.

Customers can expect temporary traffic detours, partial lane closures, and construction noise during standard working hours. Refer to Frequently Asked Questions below and sign up for regular project updates.

The image displays a construction timeline for an Advanced Water Purification Facility, including stages for conveyance pipelines and wells.

Project Maps

Map showing traffic impacts from pipeline construction north of Highway 101, indicating lane closures and traffic flow directions.

Map displaying traffic impacts due to pipeline construction south of Highway 101, including road closures and detours.

Frequently Asked Questions

Where is the construction happening?

The Advanced Water Purification Facility will be located within the existing Carpinteria Sanitary District’s Wastewater Treatment Plant, which is at 5351 6th St.

The wells will be located along Meadow View Ln. and Sterling Ave and on the Saint Joseph’s Catholic Church property (adjacent to Linden Ave.). The pipeline will be located along Olive Ave., 6th St., Maple Ave., Carpinteria Ave., Eugenia Pl., Linden Ave., and Meadow View Ln.

How are you lessening disruptions to the community?

Work hours in higher-traffic areas will be reduced during peak traffic times.
24-foot sound-dampening walls will enclose the site for the duration.
During evening work, sound is capped at 75dB at your property line. This will be continuously monitored.
Scheduling of construction activities around school calendar.
At night, lights will face downward and be shielded.
Streets and landscaping will be repaved or replanted to City standards before crews demobilize.
Mufflers on loud equipment.

Where are the pipelines located, and what should I expect?

One block at a time, the construction team will open-cut trenches in the streets and a private commercial parking lot. The construction will last eight months.

A 5,400‑ft, 10-inch pipeline will carry purified water to the wells, and shorter 12-inch and 24-inch lines return clean‑out (backwash) water to the sewer.

You can expect:

Daytime construction hours with night work only if a busy intersection requires it.
Work hours in higher-traffic areas reduced during peak traffic times.
Temporary single‑lane closures and flaggers will keep traffic moving.
Streets and landscaping are repaved or replanted to City standards before crews demobilize.

Where will the wells be installed, and what should I expect?

Construction of the injection and monitoring wells will last approximately seven months. There will be four periods during that time with 24-hour shifts for construction staff; this will last about two months.

Two groups of wells installed close to one another (“well clusters”) will track water quality. Following construction, these wells will not be visible to the public.

Two injection wells will add purified water to the local groundwater basin. Above-ground piping and electrical cabinetry will be visible following construction.

What to Expect During Well Drilling:

24-foot sound-dampening walls will enclose the site for the entire seven months during well drilling activities.
During evening work, sound will be capped at 75dB at residential property lines. This must be continuously monitored.
Lights will face downward and be shielded.
Night work will end once drilling is complete.

What to Expect After Drilling (Up to several months after drilling crews leave):

Crews will return for one shorter visit to set piping and small control cabinets.
Finished wells will sit below grade under a manhole lid; cabinets are painted to blend in.
Black wrought iron fencing will enclose and protect the facilities and landscape will be added to the exterior to provide a visual barrier.

Will Garbage Pickup or Mail Service be disrupted?

These services will continue during construction and will not be disrupted.