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Top-Rated Water treatment & purification system repair or service pros in Los Angeles - Updated Nov 2026

Avatar for Pier Water Solutions LLC
Pier Water Solutions LLC
4.8(
28
)
Water Treatment & Purification System - Repair or Service

Serving Los Angeles, CA and surrounding areas

Approved

In business since 1960

Free estimates

Warranties offered

"Great communication in arranging a time for service. Walked through in detail what he could do and was very communicative in asking for feedback where needed. Tyler was efficient, thorough and completed the installation of our hot/cold water system along with RO system."
Commercial RO
Commercial RO System
WATER SOFTENER REPLACEMENT
WATER SOFTENER REPLACEMENT
EVERPURE WHOLE HOUSE SYSTEM

+2

Response time2 days
4 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Hague Quality Water
Hague Quality Water
4.6(
91
)
Water Treatment & Purification System - Repair or Service

Serving Los Angeles, CA and surrounding areas

Approved

In business since 1994

Free estimates

Warranties offered

"professional representative, great installation team, they best product in the market. all together make it as a great package. I did little research before purchasing their products and I went through a few appointments, LA Purification became as my best option for water softener System."
H3500 Reverse Osmosis
R.O. Installation
WaterMax Signature Series
WaterMax Signature Series Cutaway
Response time1 day
Recommended by96%of homeowners
Avatar for Western Rooter & Plumbing
Western Rooter & Plumbing
4.8(
172
)
Water Treatment & Purification System - Repair or Service

Serving Los Angeles, CA and surrounding areas

Approved

In business since 1981

Free estimates

Emergency services offered

"Hats off to Daniel W. from Western Rooter who installed a water filtering system in my garage. Right from speaking with him on the phone, he was courteous, friendly, and very knowledgeable in his craft. You would think that companies would offer you their premium package right from the beginning but not Daniel. Instead, he asked what I was looking for and took the time and effort to send me multiple filtering systems (including Amazon choices) to choose from. This gesture tells you that he is looking for the customer's best interest at hand which is outstanding. Once I selected my choice, he thoroughly explained the contract and servicing process as well as answered all the questions I had. No big complicated words or complex contracts to decipher but simple and easy was the way Daniel pitched it. All in all, Western Rooter needs to hire more professional, knowledgeable, and charismatic people like him as he is a prime example of excellent customer service. I plan to use his services in the future and will definitely refer him to neighbors, friends, and family. Thank again Daniel W."
Ruben installs a new drainage system under a customers home. Working in a crawl space is rough, but we do what is needed.
Backing up? Got roots? Blast those roots out with a Hydro Jetter! We use a wart hog nozzle that combines controlled rotation with a unique 8 jet cutting configuration optimized for removing roots. It’s better with a jetter! Call us! We got this! ??
Sewer Line Camera
No drain clog too big or small, Western Rooter covers them all!
Justin clearing a Kitchen sink back-up after the Memorial holiday.
HALO 5 whole house water filtration system.

+542

Response time12 hrs
Response rate100%
10 neighbors recently requested a quote
Avatar for Mifkis Plumbing
Mifkis Plumbing
4.8(
29
)
Water Treatment & Purification System - Repair or Service

Serving Los Angeles, CA and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Repipe sink drain
Repipe sink drain
Repipe sink drain
Unclog the toilet
Unclog the toilet

+2

Avatar for Clear All Rooter Plumbing
Clear All Rooter Plumbing
4.4(
473
)
Water Treatment & Purification System - Repair or Service

Serving Los Angeles, CA and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"Christian was prompt, friendly, and on service call did not charge us since it was an easily serviceable problem (for him, not us the homeowners) and he easily could have told us the fixture needed repair and/or replace."
New Gas line
Trench
Metter connection
New earth Quake shut off Valve
New trench less  pipe

+92

Response time4 hrs
Response rate85%
31 neighbors recently requested a quote
Avatar for Pure Plumbing Company
Pure Plumbing Company
5.0(
9
)
Water Treatment & Purification System - Repair or Service

Serving Los Angeles, CA and surrounding areas

Approved

In business since 2009

Free estimates

Credit card accepted

"Johnny has done a lot of work for me over time, and every experience has been excellent. He is honest, professional, and truly knows his craft. His work quality is outstanding. He rerouted a pipe and installed a water hose in my backyard when no one else was able to figure it out. He also replaced my water heater quickly and efficiently, and more recently, he fixed a water faucet that was only producing hot water. Each job was done right the first time. These are just a few examples—Johnny has worked with me on several different projects, and every time he has been reliable, knowledgeable, and fair with pricing. It’s hard to find someone this trustworthy and skilled. I highly recommend Johnny to anyone looking for a plumber who is knowledgeable and honest."
Response time6 hrs
1 neighbors recently requested a quote
Avatar for Goettl Plumbing - Simi Valley
Goettl Plumbing - Simi Valley
New to Angi
Water Treatment & Purification System - Repair or Service

Serving Los Angeles, CA and surrounding areas

Approved

In business since 1939

Free estimates

Emergency services offered

Established in 1939, we do residential HVAC and plumbing the right way, not the easy way. At Goettl, we are total home comfort solution providers, enhancing the quality of life in the communities we serve. As Sadie Certified professionals, equipped with cutting-edge tools and technology, we deliver a superior customer experience, one home at a time.

HVAC/Plumbing
HVAC/Plumbing
HVAC/Plumbing
HVAC/Plumbing
HVAC/Plumbing

+8

Avatar for One Water Systems
One Water Systems
4.7(
49
)
Water Treatment & Purification System - Repair or Service

Serving Los Angeles, CA and surrounding areas

In business since 2006

Free estimates

Emergency services offered

"Installation went smoothly. I've had the system for about 5 years and I recommend it highly. The water tastes great. We don't buy water anymore. Our pipes are protected from mineral buildup. Very pleased with our purchase."
April 2013 Install
April 2013 Install
Valley Center Install
Additional Photos
Additional Photos

+11

Recommended by89%of homeowners
Avatar for Mr. Plumber Man
Mr. Plumber Man
5.0(
18
)
Water Treatment & Purification System - Repair or Service

Serving Los Angeles, CA and surrounding areas

In business since 2004

Emergency services offered

"Gabriel is an outstanding plumber. He is hard-working, honest and professional. His knowledge of repair/renovation is vast. He is able to fix or actually perform new construction altogether. I highly recommend him without reservation. Thank you so very much Gabriel! ???"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+31

Recommended by100%of homeowners
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FAQs for water treatment & purification system repair or service projects in Los Angeles, CA

If your water softener is over 10 years old or if repair costs approach the price of a new unit, it might be time to replace it. Most water softeners last between 10 and 15 years. Replacing an aging unit can improve your water quality and help you avoid frequent repair costs. For a newer system with minor issues, repairing may be the best option. Consider the age and condition of your system to decide what's most cost-effective.

Water treatment systems remain dependable for 10 to 20 years with proper maintenance and care. A well-maintained system secures full performance by following a scheduled upkeep plan and professional inspections. Consistent maintenance guarantees continuous water purification, ensuring that the system operates at its peak efficiency and delivers high‑quality water throughout its lifespan.

Faulty water softeners exhibit clear symptoms that signal the need for immediate attention. Noticeable mineral build-up around faucets, discolored water, dry or itchy skin following a shower, and altered laundry texture indicate that the system is underperforming. Recognizing these issues early and addressing them promptly prevents further damage and maintains optimal water quality. Early intervention ensures that your water system continues to operate reliably and efficiently.

The Los Angeles, CA homeowners’ guide to water treatment & purification system repair or services

From average costs to expert advice, get all the answers you need to get your job done.