How Good Water works
A filter that connects to your kitchen tap and cleans the water in three stages, without electricity.
- PP · polypropylene
Sediment filter
Holds back what you can see: sand, soil and pipe rust. Leaves the water clear.
Rust 
Sediment SedimentRustSandDirtSiltLarge particles - Activated carbon
Activated carbon
Reduces chlorine from municipal treatment and the compounds behind bad smell and taste.
Chlorine 
Odors ChlorineOdorsBad tasteChemical residuesPesticidesVolatile organic compounds (VOCs) - UF · 0.01 micron
Ultrafiltration membrane
Pores thousands of times finer than a hair. Holds back bacteria and microplastics while letting minerals through.
Bacteria 
Microplastics BacteriaMicroplasticsUltrafine particlesMicroorganismsCystsColloids
Install it yourself in five minutes.
Step 1Connect to the tap
Screw the diverter valve onto your kitchen tap. No tools, no plumber.
Step 2Turn the valve
Switch between regular tap water and filtered water with one turn.
Step 3Pour and drink
Filtered water instantly, straight into your glass or pot.
Fits 99% of standard kitchen taps. Not compatible with pull-out or sprayer taps.
We wanted to know. So we had it tested.
We didn't want to simply say GOOD WATER works. We wanted to prove it.
We sent a sample of water filtered with GOOD WATER to SLAB Perú, a lab accredited by INACAL under ISO/IEC 17025.
The microbiological parameters tested were below the lab's detection limit, and the metals tested were below the limits set for drinking water.
| Parameter | Result | Allowed limit |
|---|---|---|
| Total coliforms UFC/100 mL | <1 | 0 |
| Fecal coliforms UFC/100 mL | <1 | 0 |
| Escherichia coli UFC/100 mL | <1 | 0 |
| Heterotrophic bacteria UFC/mL | <1 | 500 |
| Lead mg/L | <0.006 | 0.01 |
| Mercury mg/L | <0.0004 | 0.001 |
| Arsenic mg/L | <0.008 | 0.01 |
| Cadmium mg/L | <0.0005 | 0.003 |
| Iron mg/L | 0.023 | 0.3 |
| Manganese mg/L | 0.0086 | 0.4 |
| Turbidity NTU | 0.20 | 5 |
| Free chlorine mg/L | <0.01 | — |
| pH | 7.83 | 6.5 – 8.5 |
| Conductivity µS/cm | 303.4 | 1500 |
| Total dissolved solids mg/L | 170 | 1000 |
| Total hardness mg/L CaCO₃ | 144 | 500 |
“<” means the value is below what the lab equipment can detect. Limits from Peru's drinking water quality regulation (DS 031-2010-SA).
Maintenance
You only change the cartridge every 8 to 12 months. It takes a minute: unscrew the old cartridge and screw in the new one. We remind you when it's due.