A

Is Watts Water Technologies PFAS-free?

Across 14 graded products, Watts Water Technologies averages A (95/100). On disclosure, the brand says nothing publicly about PFAS. 14 of its products grade C or better. Grades are model-based estimates, not lab results.

Worth buying from Watts Water Technologies C or better, safest first

Watts Stage 3 Under Sink Reverse Osmosis Water Filter System EZH2O

Watts Water Technologies

Watts Stage 3 Under Sink Reverse Osmosis Water Filter System EZH2O

RO membrane, carbon filters, polypropylene/polyethylene housing

A
B
PFASAll
A · Very low PFAS2 flags

Lower concern for typical use, but no PFAS transparency from Watts; RO membranes themselves are not PFAS-coated.

Brand says nothing about PFAS

Watts Four Stage Reverse Osmosis System PWROKC4

Watts Water Technologies

Watts Four Stage Reverse Osmosis System PWROKC4

carbon and RO membrane filters

A
C
PFASAll
A · Very low PFAS4 flags

Lower-concern RO system; standard materials, but brand offers no PFAS transparency.

Brand says nothing about PFAS

Watts Premier RO Pure Plus Reverse Osmosis Water Filter System

Watts Water Technologies

Watts Premier RO Pure Plus Reverse Osmosis Water Filter System

Reverse osmosis membrane, carbon pre-filters, plastic housing

A
B
PFASAll
A · Very low PFAS3 flags

Lower concern for PFAS, standard RO filters use established safe materials, but no transparency from brand.

Brand says nothing about PFAS

Watts Premier Under Sink Water Filtration System WP 5- 50

Watts Water Technologies

Watts Premier Under Sink Water Filtration System WP 5- 50

activated carbon filter media, brass/nickel fittings, plastic housing

A
B
PFASAll
A · Very low PFAS2 flags

Lower concern for typical use; common filter design with no known PFAS red flags, but no brand transparency.

Brand says nothing about PFAS

Watts 4-Stage Reverse Osmosis System 7100103

Watts Water Technologies

Watts 4-Stage Reverse Osmosis System 7100103

RO membrane, carbon filters, polyethylene tubing

A
C
PFASAll
A · Very low PFAS4 flags

Lower-concern water filter; standard RO membranes and carbon media rarely require PFAS, but Watts discloses nothing.

Brand says nothing about PFAS

Watts 4 Stage Kwik Change RO System GPD w

Watts Water Technologies

Watts 4 Stage Kwik Change RO System GPD w

Reverse osmosis (RO) membrane, carbon block filters, polypropylene housing

A
C
PFASAll
A · Very low PFAS4 flags

Lower PFAS concern for RO cartridge itself; no red flags in public data, but Watts provides no transparency.

Brand says nothing about PFAS

Watts 50 GPD RO System

Watts Water Technologies

Watts 50 GPD RO System

RO membrane (polyamide), carbon filters, polypropylene/steel housing

A
B
PFASAll
A · Very low PFAS3 flags

Lower concern; RO systems inherently use standard filtration materials, but Watts provides no explicit PFAS transparency.

Brand says nothing about PFAS

Watts BB-S101 Whole Home System

Watts Water Technologies

Watts BB-S101 Whole Home System

Carbon and sediment filter cartridges; housing components

A
B
PFASAll
A · Very low PFAS2 flags

Lower-concern whole-home filter, but Watts provides no public PFAS transparency, verify direct with manufacturer if concerned.

Brand says nothing about PFAS

Watts Water Quality Flowmatic Flow-Pur Dual Exterior Water Filter Kit

Watts Water Technologies

Watts Water Quality Flowmatic Flow-Pur Dual Exterior Water Filter Kit

activated carbon and polypropylene filter media

A
B
PFASAll
A · Very low PFAS2 flags

Lower-concern water filter, carbon and PP media lack known PFAS risk, but brand makes no PFAS disclosure.

Brand says nothing about PFAS

Watts OneFlow Plus Salt-Free Scale Prevention Water Filtration System

Watts Water Technologies

Watts OneFlow Plus Salt-Free Scale Prevention Water Filtration System

Carbon filter media, tank housing (composite/polymer)

A
B
PFASAll
A · Very low PFAS2 flags

Lower PFAS concern for typical carbon filtration, but Watts makes no PFAS transparency statements.

Brand says nothing about PFAS

WATTS Pure Water PWDWHCL1 Single-Stage Lead Filtration System

Watts Water Technologies

WATTS Pure Water PWDWHCL1 Single-Stage Lead Filtration System

Activated carbon and lead-removal cartridge media

A
C
PFASAll
A · Very low PFAS3 flags

Lower-concern filter type, but brand offers no PFAS transparency, contact them directly.

Brand says nothing about PFAS

Watts OFTWH-R Water Filtration and Treatment

Watts Water Technologies

Watts OFTWH-R Water Filtration and Treatment

Activated carbon and sediment filter media (standard RO/carbon filtration)

A
B
PFASAll
A · Very low PFAS3 flags

Lower PFAS concern for standard carbon/sediment filtration, but Watts does not disclose PFAS policy.

Brand says nothing about PFAS

Watts In-Line Water Filter Pil-10

Watts Water Technologies

Watts In-Line Water Filter Pil-10

Polypropylene housing, sediment/carbon filter media

A
C
PFASAll
A · Very low PFAS4 flags

Lower concern, typical sediment filter with no known PFAS triggers, but brand offers no transparency.

Brand says nothing about PFAS

Watts 7100449 20" Full Flow Carbon Block Filter

Watts Water Technologies

Watts 7100449 20" Full Flow Carbon Block Filter

activated carbon block filter media

A
B
PFASAll
A · Very low PFAS2 flags

Lower concern for carbon block filters; no PFAS signal detected, but Watts makes no public disclosure.

Brand says nothing about PFAS

Every grade uses the same public rubric. How grades work →