Best Filter for Arsenic in Well Water
A testing-first guide to choosing an arsenic filter for private well water, including reverse osmosis, adsorptive media, anion exchange, certification checks, and follow-up testing.
Private well water, decoded
Test first. Match the filter to the contaminant.
MyWellWaterGuides helps well owners figure out what is in their water, which test to buy, and which filtration approach actually fits the problem.
Sample report Private well baseline
- Coliformtest yearly
- Nitratelab confirm
- pH / TDScontext
- Ironstains
23M+ U.S. households rely on private wells, according to EPA estimates.
Annual EPA recommends yearly testing for coliform bacteria, nitrates, TDS, and pH.
Specific Filter claims should match the contaminant and certification, not a generic promise.
Start by problem
Find the guide that matches your water
Lab first
Test kits
What to test first, when to use home strips, and when a certified lab is worth it.
By resultContaminants
Arsenic, bacteria, nitrates, PFAS, lead, iron, manganese, sulfur, radon, and more.
By fixFilters
RO, UV, sediment, carbon, whole-house, under-sink systems, and softeners.
By clueSymptoms
Orange stains, rotten egg smell, cloudy water, salty taste, and black specks.
By mapStates
Regional guides for geology, common contaminants, and state testing resources.
Buyer pathEssential products
The core testing, filtration, and maintenance categories most well owners compare.
Launch articles
Problem-first guides
Built around testing, interpreting results, and choosing the right filter category.
Best Filter for Iron in Well Water
How to choose the best iron filter for private well water based on lab results, iron type, pH, manganese, iron bacteria, and household flow rate.
Best Filter for Rotten Egg Smell in Well Water
A practical guide to fixing rotten-egg odor in private well water with testing, water-heater checks, aeration, chlorination, oxidizing filters, and follow-up maintenance.
Essential products
Categories to compare after testing
Annual well water test kit
A baseline kit should cover bacteria, nitrates, pH, and total dissolved solids before filter shopping.
Shortlist pendingCertified lab water panel
Use a lab panel for health-related contaminants, real estate decisions, babies, pregnancy, or repeat failures.
Shortlist pendingSpin-down sediment filter
A serviceable first stage for visible grit, sand, or heavy sediment before finer cartridge filters.
Shortlist pendingCartridge sediment housing
Common whole-house protection for downstream filters, fixtures, appliances, and UV systems.
Shortlist pendingUnder-sink reverse osmosis system
Often considered for arsenic, nitrate, PFAS, lead, TDS, and other drinking-water concerns after testing.
Shortlist pendingUV disinfection system
A no-chemical disinfection option that depends on clear water, correct sizing, and regular lamp service.
Shortlist pendingSome future product links may be affiliate links. Current product blocks are placeholders until specific recommendations are reviewed.