Water Filters Help Choosing a Water Filter by Water Contaminant

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Easy to find water filters and replacement water filters including Culligan whole house water filtration systems and under sink reverse osmosis filters

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Home > Water University > Water University: 5. Choose your Filter

Water University: 5. Choose your Filter

1. Why Water? | 2. Why Filtered Water? | 3. Why Waterfilters.net?
4. Evaluate your Water | 5. Choose your Filter | 6. Find your Filter | 7. Water Quiz
Contaminants | Water Glossary | Water Resources | Water News

You can find the impurities or contaminants in your water within the left column. The right column will present filtration options to reduce the impurities or contaminants.

Impurity	Water Filter System:
Sediment (extra-fine dirt, sand, sediment, silt, rust particles, scale particles) Point of entry (whole house)	Residential (10 inch housing) a) ¾ in. Standard or ¾ in. Valve in Head Filter Housing with sediment filter cartridge (eg. S1 or P5); or b) 1 in. Big Blue Filter Housing with sediment cartridge (eg. S1-BB or DGD-5005). Commercial (20 inch housing) a) ¾ in. Standard Housing with sediment filter cartridge (eg. S1-20, P5-20); or b) 1 in. Big Blue Filter Housing with sediment cartridge (eg. S120-BB or DGD-5005-20).
Sediment (extra-fine dirt, sand, sediment, silt, rust particles, scale particles) Point of use (eg. faucet, shower, ...)	Under sink - eg. 3/8 in. SY-2650, SY-2500, SY-2300, US-600, and easy change under sink system SY-1000. Counter top - eg. CT-2. Faucet mount - eg. FM-5 and FM-15. Water pitcher - eg.OP-1. Inline/Icemaker - eg.IC-750 and IC-1000. RV/Marine - eg. US-316, RV-750, and RV-1000. Sport Bottle - eg.SB-2.
Bad Taste and Odor, and Chlorine Point of entry (whole house)	Residential (10 inch housing) a) ¾ in. Standard or ¾ in. Valve in Head Filter Housing with sediment filter cartridge (eg. GAC-10); or b) 1 in. Big Blue Filter Housing with sediment cartridge (eg. GAC-BB). Commercial (20 inch housing) a) ¾ in. Standard Housing with sediment filter cartridge (eg. GAC-20); or b) 1 in. Big Blue Filter Housing with sediment cartridge (eg. GAC-20BB ).
Bad Taste and Odor, and Chlorine Point of use (eg. faucet, shower, ...)	Under sink - eg. 3/8 in. SY-2650, SY-2500, SY-2300, US-600, US-550 and easy change under sink system SY-1000. Counter top - eg. CT-2. Faucet mount - eg. FM-5 and FM-15. Water pitcher - eg. OP-1. Inline/Icemaker - eg. IC-750, IC-100, and IC-1000. Fridge - eg.FXRC, and FXRT. Shower - eg. SR-115. RV/Marine - eg. US-316, RV-750, and RV-1000. Sport Bottle - eg. SB-2.
Asbestos	Under sink - eg. 3/8 in. SY-2650, SY-2500, SY-2300, D-40, and D-30. Counter top - eg. CT-2. Faucet mount - eg. FM-5.
Atrazine and Lindane (herbicides and pesticides)	Under sink - eg. 3/8 in. SY-2650, SY-2500, SY-2300, easy change under sink system SY-1000. Faucet mount - eg. FM-15. Inline/Icemaker - eg. IC-750 and IC-1000. RV/Marine - eg. RV-1000.
Bacteria (Lindane, Atrazine, herbicides, and pesticides)	Under sink - eg. 3/8 in. SY-2650, SY-2500, SY-2300, US-600, and easy change SY-1000. Faucet mount - eg. FM-5 and FM-15. Inline/Icemaker - eg. IC-750 and IC-1000. RV/Marine - eg. RV-1000.
Chemicals	Under sink - eg. 3/8 in. SY-2650, SY-2500, SY-2300, and easy change under sink system SY-1000.
Chlorine: Taste and Odor Point of entry (whole house)	Residential (10 inch housing) a) ¾ in. Standard or ¾ in. Valve in Head Filter Housing with sediment filter cartridge (eg. GAC-10); or b) 1 in. Big Blue Filter Housing with sediment cartridge (eg. GAC-BB). Commercial (20 inch housing) a) ¾ in. Standard Housing with sediment filter cartridge (eg. GAC-20); or b) 1 in. Big Blue Filter Housing with sediment cartridge (eg. GAC-20BB ).
Chlorine: Taste and Odor Point of use (eg. faucet, shower, ...)	Under sink - eg. 3/8 in. SY-2650, SY-2500, SY-2300, US-600, US-550 and easy change under sink system SY-1000. Counter top - eg. CT-2. Faucet mount - eg. FM-5 or FM-15. Water pitcher - eg. OP-1. Inline/Icemaker - eg. IC-750, IC-100, and IC-1000. Fridge - eg. FXRC, and FXRT. Shower - eg. SR-115. RV/Marine - eg. US-316, RV-750, and RV-1000. Sport Bottle - eg. SB-2.
Copper	Water pitcher - eg. OP-1.
Cryptosporidium and Giardia Cysts	Under sink - eg. 3/8 in. SY-2650, SY-2500, SY-2300, and easy change SY-1000. Counter top - eg. CT-2. Faucet mount - eg. FM-5 or FM-15. Inline/Icemaker - eg. IC-750 and IC-1000. RV/Marine - eg. RV-1000.
Giardia and Cryptosporidium Cysts	Under sink - eg. 3/8 in. SY-2650, SY-2500, SY-2300, and easy change SY-1000. Counter top - eg. CT-2. Faucet mount - eg. FM-5 and FM-15. Inline/Icemaker - eg. IC-750 and IC-1000. RV/Marine - eg. RV-1000.
Hard Water: (Calcium, magnesium, Lime deposits, Clear-Water, or Ferrous Iron)	Water Softener Filter or Water Softener
Lead	Under sink - eg. 3/8 in. SY-2650, SY-2500, SY-2300, and easy change SY-1000. Counter top - eg. CT-2. Faucet mount - eg. FM-5 and FM-15. Inline/Icemaker - eg. IC-750 and IC-1000. RV/Marine - eg. RV-1000.
Lindane and Atrazine (herbacides and pesticides)	Under sink - eg. 3/8 in. SY-2650, SY-2500, SY-2300, easy change under sink system SY-1000. Faucet mount - eg. FM-15. Inline/Icemaker - eg. IC-750 and IC-1000. RV/Marine - eg. RV-1000.
Mercury	Under sink - eg. 3/8 in. SY-2650, SY-2500, SY-2300, and easy change SY-1000. Counter top - eg. CT-2. Water pitcher - eg. OP-1.
MTBE	Under sink - eg. 3/8 in. SY-2650, and SY-2300.
Volatile Organic Chemicals (VOCs)	Under sink - eg. 3/8 in. SY-2650, SY-2500, and SY-2300.
Zinc	Water pitcher - eg. OP-1.