Corona's city-owned Utilities Department provides both water and sewer to its water customers, and its backflow desk reviews test reports for commercial assemblies. The City's Building Division issues plumbing permits through eTRAKiT. Call the number on this page to be connected with a local plumber in Corona.

Signs a Corona business has a plumbing problem
- A backflow test report sent back by the City for missing information
- Scale on faucet aerators, steamers and dish machine jets
- Banging pipes or a dripping relief valve, which can point to a failing pressure regulator
- Drains in a food-service suite slowing every few weeks
- Restroom pressure dropping when process equipment runs in an industrial building
- Wet pavement near the meter with no rain
How Corona's utility works for commercial customers
Corona's water is a mix of City wells, much of it run through reverse osmosis at the Temescal Desalter, Colorado River water from Lake Mathews treated at the Sierra Del Oro and Lester plants, and some State Water Project water. It's disinfected with chloramine. The latest report puts average hardness at 146 mg/L, about 8.5 grains per gallon, with readings anywhere from 7.2 to 290 depending on source. That swing is why two buildings across town can see very different scale on the same equipment.
Wastewater is treated at City water reclamation facilities. The City says pressure regulators are the customer's to replace when needed, and it asks customers to contact the utility before altering or replacing a service line. Its inventory found no lead service lines and no galvanized lines that need replacing.
The backflow desk, (951) 739-4942 or [email protected], takes results on the City's Backflow Test Form. For double check detector and reduced pressure detector assemblies, the report must include the single check bypass result or it gets rejected. The City also publishes an approved device list for service isolation. Plumbing permits come from the Building Division at 400 S. Vicentia Avenue, Suite 120, which is closed Fridays; applications and inspection requests go through eTRAKiT.
Cost factors for commercial work
- Assembly type and size when a backflow device must be repaired or swapped
- Number of tenants or fixtures on the affected line
- Access through finished ceilings, slab or parking areas
- Work scheduled outside business hours
- Permit and inspection requirements
What to expect on the call
An independent local plumber who takes commercial work in Corona will ask about the building, the symptoms and when a shutdown is possible. If the trouble is on the City's side after hours, call the Utilities Department at (951) 736-2234 and press 1 for standby.
Commercial Plumbing questions in Corona
Who has to test a business's backflow assembly here, and how often?
Does the disinfectant in the water matter for any business equipment?
How does the local water hardness affect commercial water heaters and kitchen equipment?
Does our water provider have lead service lines?
More plumbing services in Corona
Commercial Plumbing nearby
Helpful guides
Sources
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