Knowledge center
Expert guides and tips to help you understand your water quality and make informed decisions about water treatment for your home.
46 articles
Local Water Quality
Sep 28, 202618 min read
Peoria AZ tap water draws primarily from the Central Arizona Project and local groundwater, producing hardness in the 12 to 20 gpg range and TDS up to 750 mg/L in summer. This guide covers what is in Peoria water, what the City's Consumer Confidence Report shows, and which treatment options work best.
Read articleWater Quality Data
Sep 21, 20267 min read
Mesa Water District serves most of Costa Mesa from local groundwater. Its 2026 Consumer Confidence Report (2025 data) shows average hardness of 113 mg/L (6.6 gpg) and chloramine disinfection. Here is what that means for homeowners considering water treatment.
Read article
Local Water Quality
Sep 17, 202617 min read
Huntington Beach tap water is safe but hard, testing 200 to 340 mg/L (12 to 20 gpg). PFAS levels in Orange County groundwater are actively monitored and treated by OCWD. Learn what the numbers mean and how to treat your home water.
Read articleWater Quality Data
Sep 16, 202615 min read
CVWD's 2024 Consumer Confidence Report data for Rancho Cucamonga: water hardness, fluoride, contaminants detected, water sources, and what treatment options address each issue.
Read article
Water Quality Data
Sep 12, 20267 min read
Mesa's tap water comes from Salt River Project surface water in the City Zone and Central Arizona Project water in the Eastern and Southern Zones. The City of Mesa's 2025 water quality report puts average hardness at about 12 gpg and 16 gpg. Here is what the public data show and what you can do at home.
Read articleLocal Water Quality
Sep 11, 202612 min read
Tempe draws from three source waters with different mineral profiles, producing tap water that ranges from 10 to 18 grains per gallon of hardness depending on the season and blend. This guide covers what is in Tempe water, what a free home test measures, and which treatment options work best.
Read articleWater Quality Data
Sep 10, 202616 min read
Corona draws its tap water from Metropolitan Water District blended supply and local Riverside Basin groundwater. This guide synthesizes public CCR data and MWD reports to explain what Corona homeowners should know about hardness, contaminants, and treatment.
Read articleWater Quality Data
Sep 7, 20267 min read
LA County has 90+ public water systems with varying nitrate levels. The San Gabriel Basin has documented elevated nitrate from agricultural and industrial sources. Here is what current CCR and state monitoring data shows.
Read articleWater Quality Data
Sep 3, 202611 min read
Scottsdale draws nearly all its water from the Central Arizona Project on the Colorado River, water that is very hard and high in TDS. Here is what 2025 public data shows about Scottsdale tap water quality and what homeowners should consider for filtration and softening.
Read article
Water Quality Data
Aug 29, 202613 min read
A data analysis of chromium-6, contaminants, and water quality in the Coachella Valley using 2024 Consumer Confidence Reports from Coachella Valley Water District and Desert Water Agency. Covers CVWD's 9.4 ppb chromium-6 average against California's new 10 ppb MCL.
Read articleLocal Water Quality
Aug 27, 202613 min read
Gilbert tap water tests at 13 to 17 grains per gallon and up to 700 mg/L TDS in summer. This guide covers what is in Gilbert water, what a free home test measures, and which treatment options work best in the East Valley.
Read articleWater Quality Data
Aug 24, 202611 min read
Orange County blends MWD imported water, GWRS recycled water, and local groundwater to produce one of California's most complex tap water profiles. Here is what 2025 public data shows about hardness, PFAS contamination history, and what it means for homeowners considering whole house filtration or reverse osmosis.
Read articleWater Quality Data
Aug 22, 20268 min read
Consumer Confidence Reports and EPA monitoring data for major San Bernardino County water systems. Covers hardness by city, iron detections in county groundwater, and PFAS monitoring results for Rancho Cucamonga, Fontana, Ontario, San Bernardino, and Victorville.
Read articleCommercial Water Treatment
Aug 21, 202619 min read
Gilbert water TDS reaches 795 mg/L. Chandler averages 16.5 gpg hardness. Mesa reports TDS from 190 to 970 mg/L. This data guide covers what Phoenix metro municipal water contains and why commercial reverse osmosis is essential for restaurants, medical offices, and food service in Gilbert, Peoria, Chandler, and Mesa.
Read articleWater Quality Data
Aug 19, 202617 min read
A data synthesis of water quality across five major Riverside County utilities using 2024 Consumer Confidence Reports. Covers RCWD, Riverside Public Utilities, EVMWD, EMWD, and JCSD with hardness, TDS, and contaminant data.
Read articleWater Treatment Guides
Aug 15, 202615 min read
A guide to iron filters in San Bernardino County, covering EPA iron thresholds, filter media types, maintenance, and when a free water test should come first.
Read article
Water Quality Data
Aug 14, 202613 min read
Rancho Cucamonga draws from Chino Basin groundwater and MWD imports, both monitored for PFAS under EPA UCMR5. Here is what public data show, what California regulators require, and which NSF-certified filtration removes PFAS from your tap water.
Read articleWater Quality Data
Aug 13, 20269 min read
Arizona geology produces naturally elevated arsenic in groundwater. Here is what EPA data, USGS research, and Arizona ADEQ monitoring show about arsenic in Phoenix metro tap water.
Read articleCommercial Water Treatment
Aug 11, 202614 min read
Phoenix commercial water runs 464 to 716 ppm TDS and 10 to 17.6 grains per gallon hardness per the 2025 City of Phoenix Water Quality Report. This guide covers how to select, size, and maintain a commercial RO system for restaurants, breweries, and office buildings across the Phoenix metro.
Read articleWater Quality Data
Aug 10, 202610 min read
A data synthesis of PFAS contamination across Phoenix-area water utilities using EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR5) records, the April 2024 federal MCL, and ADEQ monitoring data. Which Valley utilities detected PFAS, which exceeded the 4 ppt limit, and what the numbers mean for homeowners.
Read articleWater Quality Data
Aug 8, 202611 min read
The EPA finalized Maximum Contaminant Levels for six PFAS compounds in April 2024. California's scientists set a PFOA safety goal more than 500 times stricter than the federal limit. Here is what the public data shows for Los Angeles County homeowners and what you can do about it.
Read articleWater Quality Data
Aug 6, 202616 min read
Las Vegas tap water runs 16 to 19 grains per gallon of hardness, sourced from Colorado River water delivered by SNWA. This guide explains what the public water quality data shows, how hardness affects Las Vegas homes, and what water softener options work for local conditions.
Read articleWater Quality Data
Aug 4, 202613 min read
A data synthesis of municipal water quality in Anaheim, Irvine, and Santa Ana using OC Water District CCR reports, EPA ECHO records, and California DWR data. What homeowners in each city actually see at the tap.
Read articleCommercial Water Treatment
Aug 3, 202618 min read
Mesa water averages about 12 to 16 GPG of hardness, with TDS reported from 190 to 970 mg/L. This guide covers how to select, size, and maintain a commercial RO system for restaurants, ice machines, and office buildings in Mesa AZ, grounded in City of Mesa water quality data.
Read articleWater Quality Data
Aug 1, 20269 min read
A data synthesis of nitrate contamination in San Bernardino County's Chino Basin using USGS Groundwater Ambient Monitoring and Assessment (GAMA) records, EPA regulatory benchmarks, and California drinking water standards. What the public data shows and what homeowners can do.
Read articleWater Quality Data
Jul 29, 202615 min read
California scientists set a PFOA safety goal 571 times stricter than the federal enforceable limit. Here is what the 2024 EPA PFAS rule, California's Public Health Goals, and state monitoring data mean for homeowners in Rancho Cucamonga, Fontana, and San Bernardino.
Read articleCommercial Water Treatment
Jul 28, 202614 min read
Chandler water averages 16.5 gpg of hardness and East Valley TDS regularly exceeds 700 mg/L. This guide covers how to select, size, and maintain a commercial RO system for restaurants, ice machines, and office buildings in Chandler and Gilbert AZ.
Read articleWater Quality Data
Jul 27, 202611 min read
106 wells in the Orange County Groundwater Basin were taken out of service due to PFAS contamination. The 2024 EPA MCLs and a 2026 Orange County Grand Jury report put the scale in focus. Here is what OC homeowners need to know about testing and treatment.
Read articleWater Quality Data
Jul 25, 202614 min read
A data synthesis of water quality in Riverside County, CA: hardness levels from utility Consumer Confidence Reports, nitrate detections from USGS GAMA, and arsenic from California DDW records. What the public data shows and what it means for homeowners.
Read articleWater Quality Data
Jul 23, 20267 min read
A data synthesis of three key water quality issues in Rancho Cucamonga: chromium-6 under California's 2024 MCL, hardness from CVWD Consumer Confidence Reports, and TDS from Colorado River source water. What the public data shows and what it means for home treatment.
Read articleWater Quality Data
Jul 22, 20269 min read
A synthesis of USGS GAMA, EPA SDWIS, and Consumer Confidence Report data on iron and manganese in San Bernardino County groundwater. Includes regulatory thresholds, detection patterns by basin, and what the numbers mean for homeowners.
Read articleWater Quality Data
Jul 21, 20268 min read
A data synthesis of water hardness across seven Inland Empire cities using Consumer Confidence Reports from CVWD, CalWater, Riverside Public Utilities, and more. Hardness ranges from 10 to 20+ gpg across the region.
Read article
Local Water Quality
Jul 5, 202612 min read
Scottsdale water tests 13 to 16 gpg hard with chloramine disinfection and summer TDS spikes above 700 mg/L. This guide covers carbon filters, softeners, reverse osmosis, and treatment options for Scottsdale homeowners.
Read articleLocal Water Quality
Jul 3, 202613 min read
Irvine tap water is safe but hard, testing 10 to 15 gpg. IRWD bans standard salt based softeners. Learn which treatment options are permitted and find the best solution for your home.
Read articleLocal Water Quality
Jun 29, 202611 min read
Chandler tap water runs 12 to 16 gpg hard. This guide covers what is in Chandler water, how to size and price a water softener, and the best treatment options for East Valley homes.
Read articleLocal Water Quality
Jun 24, 202611 min read
Anaheim Hills water is served by Anaheim Public Utilities and averaged about 17 grains per gallon on the Lenain-treated imported supply in the 2026 report. This guide covers hardness, chlorine disinfection, and permitted softener options for Anaheim Hills homeowners.
Read articleGuides
Jun 19, 202612 min read
Orange County water hardness varies by city and utility. Here is what hard water costs you in appliance damage, detergent waste, and energy bills, and what actually fixes it.
Read articleGuides
Jun 14, 202612 min read
Learn what a free in home water test checks for, how it compares to a lab test, who offers free testing near you, and when to upgrade to a certified lab panel.
Read article
Diagnostic
May 21, 202612 min read
Phoenix tap water tastes salty in summer because TDS climbs to 700 to 900 mg/L as canals evaporate. Learn the cause and how reverse osmosis removes sodium.
Read articleDiagnostic
May 17, 20269 min read
Los Angeles tap water hardness varies block to block because the city blends three sources. Here is what Westside, San Fernando Valley, and East LA homes actually read on a hardness test, and how to tell which side of the line your zip lands on.
Read articleDiagnostic
May 17, 20268 min read
If your Phoenix tap water suddenly tastes salty, the cause is almost always elevated TDS or sodium from groundwater blends, a worn-out softener, or a CAP supply shift. Here is how to diagnose it fast.
Read articleWater Treatment Guides
May 17, 20264 min read
A guide to whole-house water filters in Las Vegas: how the SNWA chloramine blend changes filter choice, which systems match which homes, and how to maintain a filter.
Read articleWater Quality
Jan 15, 20253 min read
Learn the telltale signs of hard water in your home and discover effective solutions to protect your plumbing, appliances, and family.
Read articleReverse Osmosis
Jan 10, 20253 min read
Compare reverse osmosis systems to bottled water on cost, taste, environmental impact, and water quality. Find out which option is best for your family.
Read articleMaintenance
Jan 5, 20254 min read
Keep your water softener running efficiently with this maintenance guide covering salt, cleaning, troubleshooting, and when to call a professional.
Read articleWater Quality
Dec 20, 20245 min read
An honest look at water quality across Arizona, Southern California, and Nevada -- common contaminants, hardness levels, and what you can do to improve your home's water.
Read article