Backflow Testing in Solano County, California
AWWA-certified annual backflow testing across Vallejo, Fairfield, Vacaville, Benicia, Suisun City, Dixon, and Rio Vista service areas.
- CCL: #1062017
- AWWA Backflow Tester Cert.: #15112
- AWWA Specialist Cert.: #03373
- 9 Solano purveyors covered
Serving: Vallejo, Fairfield, Vacaville, Benicia, Suisun City, Dixon, Rio Vista.
Do I need backflow testing in Solano County?
If you have a backflow prevention assembly on a Solano County service, yes. Each city runs its own municipal code program, and SID plus SSWA deliver retail potable water to outlying communities under SWRCB CCCPH.
“The City performs annual field testing of all backflow assemblies to verify proper design and function.”
City of Vacaville alone maintains nearly 1,700 backflow prevention devices installed on water service lines throughout the city, and SSWA distributes through over 90 miles of pipeline to more than 28,000 customers.
Not sure which utility serves your address? Call (800) 684-8346.
Water purveyors in Solano County requiring annual testing
Each city administers its own cross-connection program under its Title 11, 13, or 22 water chapter. SID and SSWA cover the rural retail potable footprint.
| Purveyor | Service Area | Governing Rule |
|---|---|---|
| City of Vallejo Water Department | City of Vallejo (largest city, pop. ~126,000) + portions of Mare Island | Vallejo Municipal Code Title 11, Chapter 11.38 — Control of Backflow and Cross-Connections (Ord. 922 N.C.) |
| City of Benicia Public Works | City of Benicia | Benicia Municipal Code Chapter 13.28 — Control of Backflow and Cross-Connection to City Water System |
| City of Fairfield — Water Division | City of Fairfield (county seat) | Fairfield Municipal Code Chapter 22 — Water |
| City of Vacaville Utilities | City of Vacaville (~1,700 backflow devices in system) | City Cross-Connection Control Program under SWRCB CCCPH |
| City of Dixon Public Works | City of Dixon | Dixon Municipal Code §14.02.1550 — Cross-Connection Control and Prevention of Backflow Standards |
| City of Rio Vista | City of Rio Vista (8 wells, 18+ miles of main) | Rio Vista Municipal Code (water utility provisions); SWRCB CCCPH |
| Suisun-Solano Water Authority (SSWA) | City of Suisun City (over 90 mi of pipeline, 8,600+ services, ~28,000 customers) | SSWA policy under SID + City of Suisun; SWRCB CCCPH |
| Solano Irrigation District (SID) — retail potable systems | Elmira, Gibson Canyon, Pleasant Hills, Blue Ridge Oaks, Quail Canyon, Stocking Ranch, Peabody, Tolenas | SID District Standards; SWRCB CCCPH |
| Rural North Vacaville Water District (RNVWD) | Rural unincorporated area north of Vacaville | RNVWD District Policies; SWRCB CCCPH |
Solano County Water Agency is the wholesale supplier (North Bay Aqueduct / Solano Project) and does not run a retail cross-connection program. Travis AFB operates under federal DoD/USAF CCC rules.
How our testing process works
- 1
Identify your purveyor
Vallejo, Benicia, Fairfield, Vacaville, Dixon, Rio Vista, SSWA, SID retail, or RNVWD.
- 2
On-site test (10 – 20 minutes)
Certified test procedure with calibrated gauges.
- 3
If a device fails
We quote the repair on site and schedule the retest.
- 4
Report filed within 24 hours
We submit to your utility and send you a copy with the invoice.
- 5
Annual reminder
We track your anniversary date and reach out ahead of next year's deadline.
Devices we test
ASSE 1013
Reduced Pressure Assembly (RPA / RPZ)
High-hazard: Lonza Vacaville biologics bioreactors and CIP, Valero Benicia process water, brewery CIP / boilers, hospital chillers and dialysis.
ASSE 1015
Double Check Valve Assembly (DCVA)
Residential fire lines, commercial irrigation without chemical injection.
ASSE 1020
Pressure Vacuum Breaker (PVB)
Above-ground irrigation protection. Very common on residential landscape and small-acreage parcels.
ASSE 1056
Spill-Resistant Vacuum Breaker (SVB)
Modern PVB variant; standard retrofit.
California and federal compliance context
“Local health officers may maintain programs for the control of cross-connections by water users, within the users’ premises, where public exposure to drinking water contaminated by backflow may occur.”
1,700
backflow devices maintained in the City of Vacaville alone, driven by one of the world’s largest biologics manufacturing campuses and its downstream supply chain.
Authorities: SWRCB CCCPH, AWWA M14 5th ed., USC FCCCHR, EPA CCC Manual.
Cities we serve in Solano County
Vallejo
Largest city; VMC Chapter 11.38 governs. Sutter Solano Medical Center, Kaiser Vallejo, Cal Poly Maritime Academy, Touro University California, and the Mare Island redevelopment anchor commercial RP accounts.
Fairfield
County seat. Jelly Belly Candy Company, NorthBay Medical Center (154 beds, Level II Trauma), and Travis AFB's adjacent commercial footprint drive significant commercial RP volume. The former Anheuser-Busch Fairfield brewery site (closed February 2026) remains a major industrial parcel pending reuse.
Vacaville
City maintains ~1,700 backflow devices; 2,635 were inspected in the most recent cycle. Lonza Vacaville (formerly Genentech) runs one of the world's largest biologics manufacturing facilities — chemigation, CIP, boilers, chillers all run through RP assemblies.
Benicia
BMC Chapter 13.28 governs. The Valero Benicia Refinery site (idling April 2026) remains the city's largest industrial RP asset pending transition plans; Benicia Industrial Park adds warehousing and light-industrial fire-line DCVA volume.
Suisun City
Suisun-Solano Water Authority delivers treated water. Mixed residential DC and PVB plus commercial RP on the waterfront revitalization corridor.
Dixon
Dixon MC §14.02.1550 governs. Seed-industry and ag-adjacent tenants (Dixon May Fair, California Medical Facility) drive the city's commercial RP volume.
Rio Vista
Smaller Delta-front system with 8 wells and 2x 2-MG reservoirs. Rio Vista Care Inc., Trilogy at Rio Vista, and marine / marina accounts drive RP and DCVA work.
Travis AFB / Unincorporated communities
Travis AFB operates under DoD/USAF cross-connection rules; David Grant USAF Medical Center is the largest USAF hospital in CONUS. Rural north Vacaville is served by RNVWD; Elmira and Blue Ridge Oaks by SID.
Our credentials
California
CCL #1062017
Active contractor state license.
Backflow tester
AWWA Backflow Tester Cert. #15112
AWWA-certified tester.
Specialist
AWWA Specialist Cert. #03373
Cross-Connection Control Specialist.
Family-owned
Jesse Cuevas
Owner and lead tester.
Jesse Cuevas has 13+ years in backflow prevention, installation, testing, and repair. We file directly with every Solano purveyor we cover, and field work is not sub-contracted.
Frequently asked questions
How often is backflow testing required in Solano County?
Every major purveyor in Solano County requires an annual test, aligned with the California State Water Resources Control Board Cross-Connection Control Policy Handbook (effective July 1, 2024). Testing is also required after any installation, repair, or relocation.
Which water purveyors in Solano County require annual testing?
City of Vallejo (VMC Ch. 11.38), City of Benicia (BMC Ch. 13.28), City of Fairfield (FMC Ch. 22), City of Vacaville, City of Dixon (DMC §14.02.1550), City of Rio Vista, Suisun-Solano Water Authority, Solano Irrigation District (where retail potable), and Rural North Vacaville Water District all require annual testing. Zone 7 — no; wholesale suppliers and Solano County Water Agency don't run retail programs.
What happens if my device fails the test?
We explain the failure on site, quote the repair (commonly a rubber kit, check, or relief valve), and schedule the retest. We avoid starting work without your approval. Purveyors can ultimately curtail service for uncorrected failures.
Who is legally allowed to test backflow devices in California?
Only a backflow prevention assembly tester certified by AWWA or the USC FCCCHR and listed on the applicable purveyor's approved tester roster. Our lead specialist holds AWWA Backflow Tester Cert. #15112 and AWWA Specialist Cert. #03373. The company carries CCL #1062017.
Does Vacaville really have 1,700 backflow devices in service?
Yes. The City of Vacaville maintains nearly 1,700 backflow prevention devices installed on water service lines throughout the city, driven by Lonza Vacaville's biologics campus, Kaiser Vacaville, and the city's industrial and commercial corridor. City staff inspected 2,635 backflow preventers in the most recent reporting cycle.
Do Genentech / Lonza Vacaville and Valero Benicia need backflow testing?
Yes. Biologics manufacturing (Lonza Vacaville — one of the world's largest biologics sites) and refinery operations (Valero Benicia) both run extensive RP-assembly programs on process water, CIP loops, boiler feed, cooling towers, and fire lines. Annual testing is required on every installed device.
Annual deadlines in Solano County are enforced by each city utility and SID/SSWA. Non-compliance can result in water service shut-off.
Mon – Sat, 7:30 AM to 5:00 PM. Emergency response available.
Sources and authorities cited on this page
California state authority. CA SWRCB CCCPH, CA H&S Code § 116800.
Federal + standards. EPA CCC Manual, AWWA M14 5th ed., USC FCCCHR.
Solano County purveyors. Dixon CCCP, Benicia MC 13.28, Fairfield MC Ch. 22, Vacaville Utilities, SID / SSWA, RNVWD.