State licence
CA contractor licensing
Check the licence with the state board before work starts.
Open the official lookup →Water treatment service near me
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Water treatment service in San Diego, CA
There are 27 verified water firms listed in San Diego, CA. Listings are compiled from public business records and checked against the CA contractor licensing; each record shows the date it was last verified.
Verified listings27 verified listingsSpring band $2,500–$6,000CA licence + San Diego permit links
Information last verified: 8 November 2026. Dataset compiled 8 November 2026.
What qualifies as a listing
Sewer lines in San Diego
Water treatment service work in San Diego follows the same pattern as the rest of CA: the failure mode decides the method, not the other way round.
Permit rules in San Diego are set locally. Ask the city whether your job needs a permit and who pulls it.
What water work costs in San Diego
The national range is from the site’s cost guide, checked 2026-11-08. The local column applies the 1.00× metro factor and rounds to $5. It is a planning band, not a quote.
| Job | National range | San Diego planning band | What it includes |
|---|---|---|---|
| Whole-house softener, installed | $2,500–$6,000 | $2,500–$6,000 | Typical US range |
| Whole-house filtration | $3,500–$9,000 | $3,500–$9,000 | Typical US range |
| Well tank replacement | $1,200–$2,800 | $1,200–$2,800 | Typical US range |
| Well pump replacement | $900–$2,200 | $900–$2,200 | Typical US range |
| Reverse osmosis, installed | $3,500–$8,000 | $3,500–$8,000 | Typical US range |
| Annual service, no salt | $150–$400 | $150–$400 | Typical US range |
Editorial metro factor, not a measured price index. The factor is not a measured local price index; it estimates labour and permit overhead. A quote that is far below the band usually has a smaller scope, not a better price.
Licence and permit checks for San Diego
Local permit
San Diego permit office
Ask whether the job needs a permit and who pulls it.
Open the permit office →These links go to the official state or city page. The directory does not file permits and does not verify a contractor’s current insurance for you.
Sewer line firms in San Diego, CA
27 verified records. The order is the dataset order, not a ranking. Each card shows the date its record was last verified.
Verified
All Cities Water Treatment inc.
Water treatment service contractor
- Address
- 5644 Kearny Mesa Rd
San Diego, CA - Phone
- (858) 694-0929
- Website
- Not published
- Rating
- 4.9 / 5 · 320 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Triton Water Renewal LLC
Water treatment service contractor
- Address
- 12463 Rancho Bernardo Rd
San Diego, CA - Phone
- (858) 888-6565
- Website
- Not published
- Rating
- 5.0 / 5 · 346 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
San Diego Pure Water
Water treatment service contractor
- Address
- 7556 Trade St
San Diego, CA - Phone
- (760) 298-7041
- Website
- Not published
- Rating
- 5.0 / 5 · 71 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
WPS, Water Purification Systems Inc.
Water treatment service contractor
- Address
- 7343 Ronson Rd
San Diego, CA - Phone
- (619) 457-8657
- Website
- Not published
- Rating
- 4.9 / 5 · 46 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
High Quality Water of San Diego
Water treatment service contractor
- Address
- 9825 Carroll Centre Rd
San Diego, CA - Phone
- (858) 800-1146
- Website
- Not published
- Rating
- 4.9 / 5 · 483 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Allstar Water Systems
Water treatment service contractor
- Address
- 4635 Ruffner St
San Diego, CA - Phone
- (888) 777-3777
- Website
- Not published
- Rating
- 4.8 / 5 · 83 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Rayne Water
Water treatment service contractor
- Address
- 9770 Candida St
San Diego, CA - Phone
- (858) 223-3095
- Website
- Not published
- Rating
- 4.7 / 5 · 229 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
EcoWater SoCal
Water treatment service contractor
- Address
- 2241 La Mirada Dr
San Diego, CA - Phone
- (760) 840-5327
- Website
- Not published
- Rating
- 4.8 / 5 · 966 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Quick Water Heater & Filtration Company
Water treatment service contractor
- Address
- 4901 Morena Blvd
San Diego, CA - Phone
- (619) 663-4328
- Website
- Not published
- Rating
- 5.0 / 5 · 379 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Trusted Water Systems
Water treatment service contractor
- Address
San Diego, CA- Phone
- (619) 391-3515
- Website
- Not published
- Rating
- 5.0 / 5 · 342 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
AquaSmart Water
Water treatment service contractor
- Address
San Diego, CA- Phone
- (858) 375-6311
- Website
- Not published
- Rating
- 5.0 / 5 · 14 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
The Honest Water Company
Water treatment service contractor
- Address
San Diego, CA- Phone
- (858) 524-9435
- Website
- Not published
- Rating
- 5.0 / 5 · 28 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Metropolitan Water Systems EP
Water treatment service contractor
- Address
San Diego, CA- Phone
- (858) 416-9076
- Website
- Not published
- Rating
- 4.9 / 5 · 66 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Jones Pure Water Service
Water treatment service contractor
- Address
San Diego, CA- Phone
- (619) 738-0241
- Website
- Not published
- Rating
- 5.0 / 5 · 13 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Hague Quality Water
Water treatment service contractor
- Address
- 436 Main St
San Diego, CA - Phone
- (760) 789-5010
- Website
- Not published
- Rating
- 4.9 / 5 · 811 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Filtercon Technologies
Water treatment service contractor
- Address
San Diego, CA- Phone
- (619) 688-1810
- Website
- Not published
- Rating
- 4.7 / 5 · 26 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Pure Coast Water Company
Water treatment service contractor
- Address
- 1111 Sixth Ave
San Diego, CA - Phone
- (619) 853-6087
- Website
- Not published
- Rating
- 5.0 / 5 · 5 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Coast Water Conditioning & Plumbing
Water treatment service contractor
- Address
San Diego, CA- Phone
- (858) 488-8373
- Website
- Not published
- Rating
- 5.0 / 5 · 13 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
One Water Systems
Water treatment service contractor
- Address
- 3137 Tiger Run Ct
San Diego, CA - Phone
- (760) 994-4795
- Website
- Not published
- Rating
- 4.8 / 5 · 87 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Verday Smart Solutions
Water treatment service contractor
- Address
San Diego, CA- Phone
- (858) 330-0544
- Website
- Not published
- Rating
- 5.0 / 5 · 489 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Aquakleen San Diego
Water treatment service contractor
- Address
- 8765 Aero Dr
San Diego, CA - Phone
- (619) 349-5651
- Website
- Not published
- Rating
- 5.0 / 5 · 5 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Water Quality Organization LLC
Water treatment service contractor
- Address
San Diego, CA- Phone
- (619) 432-9700
- Website
- Not published
- Rating
- 5.0 / 5 · 12 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
HALO Water Systems
Water treatment service contractor
- Address
San Diego, CA- Phone
- (800) 591-0538
- Website
- Not published
- Rating
- 4.7 / 5 · 293 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
The GoodFor Company
Water treatment service contractor
- Address
- 5927 Balfour Ct
San Diego, CA - Phone
- (833) 488-3489
- Website
- Not published
- Rating
- 4.8 / 5 · 181 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
North City Water Reclamation Plant
Water treatment service contractor
- Address
San Diego, CA- Phone
- (858) 824-6001
- Website
- Not published
- Rating
- 3.7 / 5 · 14 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Point Loma Wastewater Treatment Plant
Water treatment service contractor
- Address
San Diego, CA- Phone
- (858) 292-6300
- Website
- Not published
- Rating
- 4.5 / 5 · 15 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Firms in San Diego, CA are shown in the order supplied by the dataset, not by rating or payment. No placement is sold. Each name opens that firm’s own profile page.
How this list was built
The directory starts from public business records: the firm’s own website, its published address and phone number, and the state or city licence register named above. A record is marked verified only when a person has checked the name, address, phone and licence against those sources and recorded the date. The place_id field is kept so a future rebuild can match the same entity without guessing.
The national cost band comes from the site’s cost guide. The metro factor is an editorial estimate, not a survey. No rating, review text, price or availability is invented for a verified page; where a public rating is shown it is attributed and dated.
If a record is wrong, the firm can ask for a correction or removal.Corrections: contact@watertreatmentpro.com. Read the fulllisting verification method.
Water treatment service in San Diego: common questions
How many water firms are listed in San Diego?
27 verified water firms are listed in San Diego, CA. 0 publish a website, and 26 records have been verified. The city page is generated only because the dataset contains at least one genuine listing record; a city with no record has no page.
What does water treatment service cost in San Diego?
The directory’s planning band for a torsion spring replacement is $2,500–$6,000. It is the national range ($2,500–$6,000, checked 2026-11-08) multiplied by an editorial metro factor of 1.00 and rounded to $5. It is an estimate, not a local price survey, and not a quote. Get three written quotes for the same scope.
Does CA license water contractors?
Check the licence with the state board before work starts. The official lookup is the CA contractor licensing, linked on this page. A licence or registration number is a starting point, not a substitute for checking insurance and the scope of the work.
Do I need a permit for a water in San Diego?
Ask whether the job needs a permit and who pulls it. The permit office is the San Diego permit office, linked on this page. If the contractor says no permit is needed, ask them to put the reason in writing.
Water treatment service near San Diego
The closest metros in this directory, by straight-line distance. Each link opens that city’s own cost, licence and permit page.
Guides for San Diego homeowners
What water treatment service costs
Installed ranges by job, and the five lines every quote should show.
Read the guide →Diagnose the problem first
Symptom to cause, what proves it, and what not to do first.
Read the guide →How to choose a contractor
Licence, insurance, warranty and the questions that expose a thin scope.
Read the guide →Compare the options
Repair, replace or change the opening — decided on scope and five-year cost.
Read the guide →Browse the whole directory.
All service areas ·All CA service areas ·Cost guides ·Methodology