Water Quality & Testing

Lab testing services, DIY kits, and interpreting your water report.

Latest Guides & Reviews

Understanding Your Water Report: TDS, PFAS, and Heavy Metals

How to read municipal water quality reports and identify hidden contaminants.

By Jennifer Wu • Jan 05, 2025

Cornerstone Guide

The Ultimate Guide to Water Quality & Testing

Read our comprehensive 5,000-word deep dive into everything you need to know about water quality & testing, from basic principles to advanced selection criteria.

Read the Guide

AdvertisementFeatured Suppliers

Top Home Water Filtration Brands

Trusted brands across whole-house systems, reverse osmosis, and drinking-water filters. Listings link directly to each brand. Our reviews and ratings are editorially independent and never for sale.

Filtration & Treatment for the Home

WaterVO

Trusted Supplier

Our trusted supplier for filtration, atmospheric water generators, and home hydration.

Visit Site

AquaTru

Countertop RO

Countertop reverse osmosis certified to reduce 80+ contaminants — no plumbing.

Visit Site

Waterdrop

Tankless RO

Space-saving tankless reverse osmosis systems, pitchers, and replacement filters.

Visit Site

SpringWell

Whole-House

Whole-house carbon and salt-free systems built for city water and problem wells.

Visit Site

Aquasana

Whole-House

Whole-house and under-sink filtration with long-life, high-capacity cartridges.

Visit Site

Clearly Filtered

Pitchers

Pitchers and bottles independently tested against hundreds of contaminants.

Visit Site

Sponsored listings. Hydrology University may earn a fee from advertisers featured here. Listings are not endorsements and do not constitute legal, financial, or professional advice.

Tankless RO & FiltersUpgrade to tankless reverse osmosis with Waterdrop — Space-saving systems, pitchers, and replacement filters at consumer-friendly prices.

Shop Waterdrop