Same test, different paperwork — district by district
Here’s the part of Colorado’s backflow system nobody warns you about: the test is the same everywhere, but where the report goes is different in every district — and a test that never gets filed is a test that never happened, as far as your district’s compliance clock is concerned. This page tracks how districts actually take reports. Every row is verified against the district’s own page and dated; we add districts as we verify them.
Verified districts (July 2026)
| District | How test reports are filed | Source |
|---|---|---|
| Denver Water | Email to crossconnectioncontrol@denverwater.org; annual testing by a certified tester required | program page |
| Southgate Water & Sanitation | Program is managed by Denver Water — reports go to Denver Water’s Cross-Connection Control section | district page |
| Bancroft-Clover W&S | SwiftComply portal (free one-time registration) or email to the district | district page |
Three districts, three different answers — one takes email, one outsources its entire program to a neighboring utility, one runs a portal. Multiply that across the state’s public water systems, each building its program from CDPHE’s templates (Regulation 11 guidance, forms, and appendices), and you have the whole story of why the letters confuse people.
The portals your tester may deal with
- BSI Online — an administrative service some districts hire; customers look up testers through it with the confirmation number printed on the district letter.
- SwiftComply — same idea, different vendor; Bancroft-Clover moved to it in late 2024.
- Plain email or paper — still common, Denver Water included.
Filing fees, when portals charge them, are typically the tester’s to handle — which is one of the things baked into what a test costs.
What to do with your letter
- Find the district name and any confirmation/account number — that determines the filing path.
- Don’t assume your district works like your last address’s district.
- Book a certified tester who already files with YOUR district — they know the portal, the form, and the deadline math. That’s what the form on this page is for: tell us the district, we connect you with a certified tester who works it.
Your district not listed yet? Send us the letter’s district name through the form — we verify against the district’s own pages and add it to this table.