City of Hawthorne Water delivers 275 PPM hard water to your home. Our whole-home filtration systems remove hardness, chlorine, and scale — for softer skin and better-tasting water from every tap.
Hawthorne's water is supplied by the City of Hawthorne Water. The local supply measures 275 PPM of hardness, classified as "Hard" — well above the 120 PPM threshold that defines hard water.
The utility also uses chlorine/chloramines at roughly 1.9 mg/L for disinfection. While safe to drink, these leave a chemical taste and odor and can dry out skin and hair. The high mineral content causes scale buildup on fixtures, glassware, and appliances — the most common water complaint we hear from Hawthorne homeowners.
Hard — anything over 120 PPM is considered hard water.
Used for disinfection — causes bad taste and dry skin.
Hard water spots and chlorine taste in tap water.
Hawthorne is a city in the South Bay region of Los Angeles County, California, United States. It was founded in 1905 and incorporated on July 12, 1922. The city had a population of 88,083 at the 2020 census. Originally part of the Rancho Sausal Redondo Mexican land grant, Hawthorne was named after New England author Nathaniel Hawthorne. Aircraft pioneer Jack Northrop established his company in Hawthorne, beginning the city's long aerospace legacy.
As a locally based water filtration company serving Hawthorne and the surrounding Orange County area, truClear Water Filtration Co. understands the specific water quality challenges that Hawthorne residents face. Our team has installed hundreds of whole-home filtration and softening systems in Hawthorne homes, giving us firsthand experience with the mineral content, scale behavior, and chlorine levels characteristic of the City of Hawthorne Water supply.
Whether you live in a newer Hawthorne development or an established neighborhood with older plumbing, our free in-home water test will reveal exactly what's in your water — and our licensed installers (Applied Plumbing & Rooter, CA Lic. #1151992) will recommend the right system for your home's specific needs.
At 275 PPM, Hawthorne water is packed with calcium and magnesium. Over time, these minerals crystallize inside your pipes, water heater, and appliances.


* Drag the slider to compare scale buildup vs. protected pipes
Four premium filtration solutions — we'll help you pick the right one based on your free in-home water test.
Stainless Steel System
Ultimate protection with lifetime warranty. Maximum filtration and salt-free scale prevention.
High-Capacity System
Excellent whole-home filtration and scale control at an incredible value.
Space-Saving Design
Advanced Filtersorb SP3 technology protecting your plumbing, fixtures, and appliances.
Under-Sink Drinking Water
Bottled-quality water right at your kitchen sink. Removes 99% of dissolved solids.
Reach out for a free, no-obligation consultation. We answer fast.
We test your Hawthorne home's water and recommend the right system.
Professional Installation by Applied Plumbing & Rooter, Inc. — CA License #1151992
Common questions from Hawthorne homeowners about our water filtration systems.
We provide the same premium water filtration and free testing to homeowners in the surrounding communities.
Lock in your $300 savings and 50% off reverse osmosis — plus 3 years of complimentary filter & media replacements.