Already applied for Carlsbad
Your seat carries to the new Carlsbad date or to Dallas, whichever you choose. We will call you.
Carlsbad, California · Early 2027
Carlsbad Returns in Early 2027: How to Get the Dates First, and How to Put Your City on the Tour
The Carlsbad class set for October 27-29 was postponed because of the October wildfires in northern San Diego County, including the Henderson Fire at Camp Pendleton, which forced evacuations and closed Interstate 5 in the two weeks before the class. Carlsbad is rescheduling for early 2027. Here is how the new dates get announced, what happens to a seat you already applied for, why the tour goes to HALO's hometown at all, and how any city gets on the schedule.
The new dates go up on the Carlsbad page first, and everyone who has applied hears before the page does.
Short answer
Apply Now, Hear First
Carlsbad is rescheduling for early 2027, no date set yet. The new dates are announced on the Carlsbad page first, and everyone who has applied gets a call before they are posted. If you applied or paid for the October class, your seat carries to the new Carlsbad date or to Dallas, your choice, and we will call you. Nothing has to be redone.
Any other city gets on the tour the same way Carlsbad and Dallas did: apply, tell us your city, and we call you when it is confirmed. Every city is chosen on plumber population and documented water quality problems.
Want Carlsbad in 2027
Apply for Carlsbad now. Applicants hear the dates before the page does, and twenty seats are first come, first seated.
Want your own city
Apply and tell us your city. More cities are announced as the current ones fill, and you get a call when yours is confirmed.
What happened
Why the October Class Did Not Run
The Henderson Fire started on 15 October 2026 at Camp Pendleton, on the Marine Corps base that borders Oceanside, the next city north of Carlsbad. It closed Interstate 5 and the Las Pulgas gate and forced evacuations in the area, which were lifted on 18 October, and it was reported fully contained between 19 and 21 October. With the class set to open on 27 October, the class was postponed.
Nobody who applied loses anything. The seat and the application carry forward.
Fire dates and status from the Wildfire Explorer incident record for the Henderson Fire, which draws on the National Interagency Fire Center, InciWeb and CAL FIRE. The decision to postpone was the tour's.
Your seat
What Happens to a Seat You Already Hold
If you applied or paid for October
- Your seat carries to the new Carlsbad date in early 2027, or to Dallas, your choice
- We will call you. Tell us which one when we do.
- Nothing about your application has to be redone
If you have not applied yet
- Apply for Carlsbad now and you hear the new dates before they are posted
- No approval wait. Registration opens the moment you submit, and twenty seats are first come, first seated
- Team pricing starts at three seats from the same company and is set on a call
Source: the Carlsbad page and the application page.
Why Carlsbad
The One City Where You Cannot Look Up the Water
Carlsbad is HALO Water Systems' hometown. Glen Blavet, a Master Plumber who started in the trade in 1976, founded HALO there in 2001 to build a water system "for contractors, by a contractor." The class is a short drive from the factory, and the people who design and build the equipment are down the road, not on a screen.
It is also the perfect classroom. Three water districts serve one city, blending Colorado River water, State Water Project water and desalinated seawater from the Claude "Bud" Lewis Carlsbad Desalination Plant. Two houses a few streets apart can be on different districts, drawing different blends, and the utilities report anywhere from 3.5 to 13.5 grains per gallon depending on which one and which season. No citywide number is honest. The only way to know a Carlsbad customer's water is to test it at the tap, which is the first thing a water quality expert learns.
| District | Serves | Detail |
|---|---|---|
| Carlsbad Municipal | About 85 percent of the city | Carlsbad Municipal Water District: roughly 86,000 people through 447 miles of pipeline |
| Olivenhain Municipal | Southern Carlsbad | Olivenhain Municipal Water District, per the City of Carlsbad |
| Vallecitos | Southeastern Carlsbad | Vallecitos Water District, per the City of Carlsbad |
| Imported supply | Citywide blend | Colorado River Aqueduct and State Water Project, treated at Lake Skinner and Twin Oaks Valley |
| Desalinated supply | Citywide blend | Claude "Bud" Lewis Carlsbad Desalination Plant |
District and supply information from the City of Carlsbad; hardness range as reported by the districts and summarized on the Carlsbad water quality page, district by district with every source linked.
California plumbers
Know the License and the Softener Rules Before You Quote
California regulates who installs water treatment through the Contractors State License Board (CSLB). The C-55 Water Conditioning Contractor classification covers installing water conditioning equipment, with piping limited to connecting it; the C-36 Plumbing Contractor classification expressly covers maintenance and replacement of water conditioning equipment. Since 1 January 2025, unlicensed work is limited to jobs under $1,000 in labor and materials combined, and a water treatment install usually runs well past that.
On top of that, California law lets certain local sewer agencies restrict salt-based self-regenerating softeners, and some have. The San Diego County Sanitation District prohibits discharging softener brine into its sewers. Check with the local sewer agency before you sell a salt-based softener anywhere in the state. The HALO Certified Water Quality Expert credential is a training certification; it is not a CSLB license and does not replace one.
Each of those rules, with a link to the state and local source, is on water treatment training and licensing for plumbers in California.
Your city
How a City Gets on the Tour
Plumber population and documented water problems
Every city is chosen on those two things. Dallas is the largest plumbing market in Texas with hard water pushing nine grains and a city on record suing over its own supply. Carlsbad is three districts, a desalination blend and the manufacturer's front door.
Apply and tell us your city
The application takes about two minutes and asks for your city, your role and how many seats your operation needs. If your first-choice city fills, or is not scheduled yet, we contact you about your second choice or the next date.
You get a call when it is confirmed
More cities are announced as the current ones fill, and applicants hear first. The seventeen cities the tour has read water reports for, with their hardness figures, are on water hardness by city.
Source: the home page (how cities are chosen) and the application page (what the form asks, what happens if a city fills).
Watch it
Roger on Starting Over
Questions
Questions About Carlsbad and New Cities
When is the Carlsbad HALO Water Tour class?
The October 27-29, 2026 class was postponed because of the October wildfires in northern San Diego County, including the Henderson Fire at Camp Pendleton. Carlsbad is rescheduling for early 2027, and the new dates are announced on the Carlsbad page first. Apply and we will call you with the dates before they are posted.
I already applied or paid for the October Carlsbad class. What happens to my seat?
It carries to the new Carlsbad date or to Dallas, whichever you choose. We will call you. Nothing about your application has to be redone.
How will I find out the new Carlsbad dates?
Applicants get a call before the dates are posted. After that, the dates go up on the Carlsbad page first, then everywhere else on the site.
Why is the HALO Water Tour in Carlsbad?
Carlsbad is HALO Water Systems' hometown, a short drive from the factory, and its three water districts and desalination blend make it the one market where you cannot look up a customer's water. You have to test it at the tap, which is the first thing the class teaches.
Can I get the HALO Water Tour in my city?
Apply and tell us your city. Every city is chosen on plumber population and documented water quality problems, more cities are announced as the current ones fill, and you get a call when yours is confirmed.
Is the HALO certification a California license?
No. The HALO Certified Water Quality Expert credential is a training certification issued by HALO Water Systems. It is not a Contractors State License Board license and does not replace one.
Sources
Where These Facts Come From
Checked in October 2026. Seats, tuition, dates and the postponement are as published on this site.
- The Carlsbad class (the postponement, the seat-carry rule, the three districts, Glen Blavet and HALO's founding)
- Carlsbad water quality (the 3.5 to 13.5 grains per gallon range, district by district, with the utility reports linked)
- City of Carlsbad (district boundaries, the 85 percent, 86,000 people and 447 miles of pipeline)
- Wildfire Explorer, Henderson Fire incident record (start date, Interstate 5 closure, evacuation and containment dates), drawing on the National Interagency Fire Center, InciWeb and CAL FIRE
- Water treatment training and licensing for plumbers in California (CSLB C-55 and C-36, the $1,000 line, the San Diego County Sanitation District rule, each with its source)
- HALO Water Tour home (how cities are chosen) and Apply (the form, no approval wait, what happens if a city fills)
- The Dallas class (why Dallas anchors the Texas run)
Written by Roger Wakefield, Texas Master Plumber
45 years in the trade and LEED AP. Published . More about Roger or visit rogerwakefield.com.
Keep going
Related Guides
The Carlsbad class
New dates announced there first. The water, the days, the FAQ.
Carlsbad water quality
One city, three districts, and what the desal blend does to hardness.
California training and licensing
C-55, C-36, the $1,000 line and the softener rules.
Is water treatment right for your company?
Five signs it is, two signs it is not.
Get the Carlsbad dates before the page does.
Twenty seats, three days, a short drive from the factory, in the one market where the water itself makes the case for field testing. Apply for Carlsbad and you hear first. Not in California? Apply anyway, tell us your city, and we will call you when it is confirmed.