Alameda County
Union City formed in 1959 by merging the older communities of Alvarado and Decoto, and much like neighboring Fremont's similar founding story, the city's oldest neighborhoods carry plumbing predating that 1959 consolidation by decades.
Ximena Y., a Old Alvarado, Union City homeowner, had been living with a soft, spongy patch in the side yard that stayed wet for weeks before calling us. Union City's Alvarado and Decoto districts predate the 1959 merger that formed the modern city, carrying older plumbing than the neighborhoods built after. What could have meant a much bigger job instead only needed one targeted repair.
— Ximena Y., Old Alvarado, Union City
A closer look at the areas across Union City where we handle the most leak detection and repair calls:
One of the two original towns, dating to the 1850s, that merged in 1959 to form Union City.
The other founding town of the 1959 merger, with its own distinct 19th-century rail-stop origins.
The historic core of the original Alvarado settlement, predating the modern city by over a century.
A newer commercial and residential district built decades after the 1959 city merger.
Every service we offer statewide is available in Union City and the surrounding Alameda County area:
Detection
Pinpoint hidden leaks under concrete foundations without breaking up the whole slab.
Learn more about Slab Leak Detection →
Detection
Non-invasive detection for hidden leaks inside walls, ceilings, and under floors.
Learn more about Water Leak Detection →
Detection
Find pool shell, plumbing, and equipment leaks before water loss becomes structural damage.
Learn more about Pool & Spa Leak Detection →
Detection
Locate natural gas and propane leaks quickly for safety and code compliance.
Learn more about Gas Leak Detection →
Detection
Camera-based inspection finds sewer line breaks, root intrusion, and drain leaks.
Learn more about Sewer & Drain Leak Detection →
Detection
Locate leaks in buried main water lines and irrigation systems before they surface.
Learn more about Underground & Main Line Leak Detection →
Repair
Spot repair, reroute, or slab access — matched to your home once the leak is pinpointed.
Learn more about Slab Leak Repair →
Repair
Fixture, fitting, and in-wall pipe repairs once the leak's exact location is confirmed.
Learn more about Water Leak Repair →
Repair
Shell, plumbing line, and equipment pad repairs once the leak point is confirmed.
Learn more about Pool & Spa Leak Repair →
Repair
Coordinated repair or replacement of confirmed gas line and fitting leaks.
Learn more about Gas Leak Repair & Line Replacement →
Repair
Trenchless lining, pipe bursting, or targeted excavation once the defect is confirmed on camera.
Learn more about Sewer Line Repair (Trenchless & Traditional) →
Repair
Targeted excavation, trenchless pipe pulling, or full replacement of a confirmed main line leak.
Learn more about Main Water Line Repair & Replacement →“The floor in our hallway had a warm spot for weeks. They found the slab leak in under an hour with the listening equipment and marked a tiny area instead of tearing up the whole hallway. Huge relief.”
“Our water bill jumped for two months straight and we couldn't find why. Turned out it was a slow leak behind the water heater. Professional, on time, and explained everything on the spot.”
“Salt air had corroded a fitting outside near the meter box. They traced it with the acoustic equipment without digging up my whole side yard first. Appreciated the straightforward report.”
“Good experience overall, technician was knowledgeable and thorough. Took a little longer than expected but they were clearly being careful about pinpointing the exact spot before marking it.”
“Old Victorian with plaster walls everywhere, so I was dreading this. They used thermal imaging and found the leak behind one wall panel instead of opening up the whole room. Saved us a big repair bill.”
“Ground near our garage had been soft for a while. Turned out to be the main line. They marked the exact dig spot and our plumber only had to open a two-foot section instead of the whole path.”
