Licensed water treatment contractors in Wilmington, Los Angeles, CA
1 water treatment contractor holds an active licence on the Contractors State License Board (CSLB) register in Wilmington, checked 4 Nov 2026: 1 licensed 10 years or more, 100% bonded and none with a complaint or board disclosure on record. Ranked by a published formula; nobody pays to move up.
- Active licences
- 1
- Median time licensed
- 13.0 yrs
- Bonded
- 100%
- Lead-Safe certified
- 0
Ranked list
- 1
California Conservation
- Licence active
- Bonded
- Works alone
Questions people ask about water treatment contractors in Wilmington
How many licensed water treatment contractors are in Wilmington?
1 water treatment contractors hold an active Contractors State License Board (CSLB) licence with a mailing address in Wilmington, checked on 4 November 2026. 1 of them have been licensed for 10 years or more.
Does a water treatment contractor need a licence in California?
Yes, when the whole job, labour and materials, costs $1,000 or more or needs a permit. Below that, California's minor-work exemption (B&P Code 7048) applies, but only if they work alone. Look for an active C-55 licence.
How do I check a water treatment contractor's licence in Wilmington?
Ask for the licence number and look it up on the CSLB website, or search this page. Every water treatment contractor listed here was matched to an active licence on the CSLB register.
Which water treatment contractors rank highest in Wilmington?
By our published formula (years licensed, complaint record, bond and insurance, and Google reviews), the top three are California Conservation (54). Paying or claiming a listing never changes the order.
How much do water treatment contractors charge in Wilmington?
Water treatment contractors in the Los Angeles-Long Beach-Anaheim metro earn a median $29.40 an hour (BLS, May 2025); contractors typically bill about twice the wage to cover insurance, overhead and profit.