Coronado Island presents a distinctive water quality profile shaped by its military history, aging residential infrastructure, and proximity to Naval Air Station North Island. PFAS chemicals — persistent "forever chemicals" used in military firefighting foam — have been detected in groundwater near the base, and the San Diego Regional Water Quality Control Board actively monitors contamination levels in the area. Meanwhile, Coronado's older homes (many built between the 1890s and 1960s) contain plumbing materials that can introduce lead, copper, iron, and bacteria into your water between the city main and your faucet.Homewerx performs dual-point water testing: one sample at or near your water main to establish what California American Water is delivering to your property, and first-draw and flushed samples at the kitchen tap to measure what your home's pipes are adding. This comparison isolates the source of any contamination. We screen for lead, copper, PFAS, manganese, coliform bacteria, disinfection byproducts, hardness minerals, iron, sediment, and pH. Results are provided in a detailed report showing each contaminant's concentration relative to EPA and California state action levels, along with specific recommendations for filtration, treatment, or pipe replacement based on the findings.
For the services we offer:
Water TestingFederal water quality compliance is measured at the city main — not at your faucet. The EPA Lead and Copper Rule sets action levels at 15 ppb for lead and 1,300 ppb for copper, but these thresholds are measured in aggregate across a water system, not in individual homes. A home with lead solder on copper joints (standard in pre-1986 construction), galvanized steel pipes, or deteriorated cast iron can have lead and copper levels far exceeding action levels at the tap. Coronado's housing stock includes significant numbers of pre-1986 homes where lead solder was used, Victorian-era properties with original lead service lines, and mid-century military housing with galvanized steel supply pipes. Without testing, there is no way to know what you're drinking.
We recommend testing when purchasing a Coronado home, after any plumbing work that disturbs pipes, annually for homes with known lead or galvanized plumbing, before installing any filtration system (to ensure proper sizing), and whenever you notice changes in water color, taste, or odor. For homes with confirmed contamination, follow-up testing after treatment installation verifies the system is performing as designed.
Founded in 2024, Homewerx is a plumbing services company providing an upscale and technology enabled plumbing experience for customers in San Diego.
Become A Member