South Adams County Water & Sanitation wants every commercial backflow report by Aug. 31.
Commerce City backflow rules at a glance
| Water provider | South Adams County Water & Sanitation District, Backflow Prevention Program |
|---|---|
| Who | Commercial water users: install an approved assembly, test it at installation, then every year |
| Deadline | All reports by Aug. 31 each year |
| How reports are filed | By email to the district's Backflow Program Office |
| Who can test | A technician with ASSE or ABPA certification |
| Program contact | District main office, 303-288-2646 |
Summarized from South Adams County Water & Sanitation District's published program information (source), checked October 2026. The notice from your water provider always has the final word on your due date.
One deadline for everyone
Unlike programs that spread due dates through the year, South Adams County Water & Sanitation sets a single date: Aug. 31. That makes July and August busy for testers. Booking in spring or early summer leaves time for a repair and retest if something fails.
Drinking water and irrigation water are separate here
The district runs a separate, non-drinking irrigation system alongside its potable water. Where your property is connected to both, keeping them separated is exactly what the backflow assembly is for.
What we do on a Commerce City backflow test
- Confirm the assembly type, size, and serial number against your provider's records
- Test every check valve and relief valve with a differential pressure gauge calibrated October 2026 and traceable to NIST
- Tag the assembly with the service date, our business information, and the tester's certification number
- File the completed report the way South Adams County Water & Sanitation District requires
- Send you a copy of the report, with photos
If the assembly fails
Most failures come down to a dirty or worn check valve, a tired relief valve, or a split rubber part. Those get cleaned or rebuilt and retested, usually in the same visit, after you approve the price. If the body itself is cracked, usually from a missed winterization, the assembly has to be replaced. Replacing an assembly is installation work, which in Colorado needs a licensed plumber; we'll tell you exactly what's needed and do the retest once it's in.
Before we come out
- Have the notice from your water provider handy, or send a photo of it when you book
- Tell us where the assembly is, and leave any gate unlocked or the mechanical room open
- For sprinkler assemblies, the water needs to be on. If the system is still winterized, we can do the spring startup and the test in one visit.
Not sure what kind of assembly you have? PVB vs. DCVA vs. RPZ →
Backflow testing nearby
Denver · Aurora · Thornton · Westminster · Arvada · Northglenn · Broomfield · Golden · Lakewood · Englewood · Wheat Ridge · Parker · Boulder · Louisville · Lafayette · Greenwood Village · Centennial · Commercial & HOA testing · For plumbing & irrigation companies · Every provider's rules
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