Hi, I'm Shashank — ex-Apple & ex-Kohler engineer
The water in your home, explained by an engineer.
I read the spec sheets, pressure-test the claims, and translate the labels — so you pick the right filter for your house the first time. Engineering and evidence, not marketing.
From the founder
After 9 years building water filtration at Kohler and hardware at Apple, I started Mr Water Geek for one reason: buying a water filter is far more confusing than it should be. The answers should come from engineering and evidence. So I do the boring part for you: I read the spec sheets most people never open, and I tell you what they actually mean for your water.
Where we are · since 2019
- Articles
- 358
- Each one spec-checked, not just summarised
- Topics
- 11
- Filters, contaminants, softening, hydration
- Yrs researching
- 7
- Reader-funded, affiliate-disclosed
- Reading
- 38 h
- If you read the whole archive end to end
MWG Tools
Know your water
Free water quality report
What’s in your tap water?
Enter your ZIP code and get a free report based on EPA data — contaminants, utility violations, and what to filter.
Browse by topic
Explore everything water
Filtration & Reviews
Reverse osmosis, carbon and softeners - how each system works and which one fits your home.
320 articles
Water Science
The chemistry and research behind what is in your water, explained without the jargon.
55 articles
Safety and Regulation
Contaminant limits, EPA rules and what the standards actually mean for your tap.
14 articles
Hydration and Wellness
How much you really need, electrolytes, and what good hydration does for your body.
76 articles
Pools, Spa & More
Pools, spas, hot tubs and outdoor water systems
9 articles
Most read this week
Trending now
Hydration and Wellness
How to Add Vitamins and Minerals to Water: A Simple Guide to Boost Your Health
Filtration Systems
What is a Whole Home Water Filter?
Safety and Regulation
How To Remove Fluoride From Water: Why You Need to Be Aware
Safety and Regulation
How Is Tap Water Regulated?: Everything Homeowners Need to Know About Safe Drinking Water Regulations
Pool, Spa & Hot Tub Reviews
Do NOT Buy Above Ground Pool Filters Until You Read This!
Hydration and Wellness
Why Is The Echo Water Bottle So Expensive and Everything You Need to Know
Product Reviews
Calcium Health Concerns and The Best Calcium Water Filters
Filtration Systems
Salt vs Salt-Free Water Softeners: A Comprehensive Comparison
Safety and Regulation
4 Contaminants in Tap Water: What’s Really Coming Out of Your Faucet?
Hydration and Wellness
6 Real Benefits and The Biggest Lies About Alkaline Water
Hydration and Wellness
How to Add Vitamins and Minerals to Water: A Simple Guide to Boost Your Health
Filtration Systems
What is a Whole Home Water Filter?
Safety and Regulation
How To Remove Fluoride From Water: Why You Need to Be Aware
Safety and Regulation
How Is Tap Water Regulated?: Everything Homeowners Need to Know About Safe Drinking Water Regulations
Pool, Spa & Hot Tub Reviews
Do NOT Buy Above Ground Pool Filters Until You Read This!
Hydration and Wellness
Why Is The Echo Water Bottle So Expensive and Everything You Need to Know
Product Reviews
Calcium Health Concerns and The Best Calcium Water Filters
Filtration Systems
Salt vs Salt-Free Water Softeners: A Comprehensive Comparison
Safety and Regulation
4 Contaminants in Tap Water: What’s Really Coming Out of Your Faucet?
Hydration and Wellness
6 Real Benefits and The Biggest Lies About Alkaline Water
Hydration and Wellness
How to Add Vitamins and Minerals to Water: A Simple Guide to Boost Your Health
Filtration Systems
What is a Whole Home Water Filter?
Safety and Regulation
How To Remove Fluoride From Water: Why You Need to Be Aware
Safety and Regulation
How Is Tap Water Regulated?: Everything Homeowners Need to Know About Safe Drinking Water Regulations
Pool, Spa & Hot Tub Reviews
Do NOT Buy Above Ground Pool Filters Until You Read This!
Hydration and Wellness
Why Is The Echo Water Bottle So Expensive and Everything You Need to Know
Product Reviews
Calcium Health Concerns and The Best Calcium Water Filters
Filtration Systems
Salt vs Salt-Free Water Softeners: A Comprehensive Comparison
Safety and Regulation
4 Contaminants in Tap Water: What’s Really Coming Out of Your Faucet?
Hydration and Wellness
6 Real Benefits and The Biggest Lies About Alkaline Water
Hydration and Wellness
How to Add Vitamins and Minerals to Water: A Simple Guide to Boost Your Health
Filtration Systems
What is a Whole Home Water Filter?
Safety and Regulation
How To Remove Fluoride From Water: Why You Need to Be Aware
Safety and Regulation
How Is Tap Water Regulated?: Everything Homeowners Need to Know About Safe Drinking Water Regulations
Pool, Spa & Hot Tub Reviews
Do NOT Buy Above Ground Pool Filters Until You Read This!
Hydration and Wellness
Why Is The Echo Water Bottle So Expensive and Everything You Need to Know
Product Reviews
Calcium Health Concerns and The Best Calcium Water Filters
Filtration Systems
Salt vs Salt-Free Water Softeners: A Comprehensive Comparison
Safety and Regulation
4 Contaminants in Tap Water: What’s Really Coming Out of Your Faucet?
Hydration and Wellness