Brita vs PUR vs ZeroWater: which pitcher filter is certified for lead and PFAS, by whom, and for how many gallons

If a TDS meter reading of 000 is why you are leaning toward ZeroWater, read the TDS section before the table: the pen estimates dissolved minerals, and it cannot see lead or PFAS at the levels a certification is written for.

Which of the three should you buy?

The brand is the wrong axis. Each of the three names sells a basic filter and an upgraded one, and only the upgraded one carries a certified lead row. The full shortlist with a verdict per filter is the water filter pitcher review; this page is the comparison table behind it.

Which cartridge drops into which pitcher is a separate question, answered on the Brita filter compatibility page, the PUR PLUS vs basic page and the ZeroWater filter page.

How do the five filters compare on paper?

Every figure is the maker’s published specification, read on 2026-10-09 from the data sheet named in Sources. “Certifier” is the body the sheet names; “standards” are the numbers the sheet prints, with “tested” where the sheet says tested rather than certified.

Brita’s Elite sheet caps daily use at 2 gallons and marks its PFOA/PFOS row and several others with a footnote limiting them to named pitcher models, among them the Slim and Metro OB11, Pacifica OB41, Monterey OB50 and Denali OB62. The Elite’s NSF/ANSI 401 table also carries a microplastics row at 99.6%, a claim no other filter here prints; the microplastics guide explains what that row covers.

What does the certifier column mean?

NSF/ANSI 42 is the aesthetic-effects standard: NSF’s fact sheet describes it as covering non-health-related contaminants such as chlorine, taste and odor, particulate and total dissolved solids. NSF/ANSI 53 is the health-effects standard, with over 50 claims including lead. NSF/ANSI 401 covers up to 15 emerging compounds at trace levels, such as over-the-counter drugs and pesticides. The NSF/ANSI standards guide walks through all three.

Three bodies certify to those standards, and the maker’s sheet says which one it used. NSF’s own listings, read on 9 October 2026, carry PUR’s PPF951K pour-through element under 42, 53 and 401, with lead absent from NSF’s 53 claims; the lead row is WQA’s, per PUR’s sheet. The same database returns no Brita pitcher filter (only Total360 plumbed systems) and no ZeroWater product at all, so those two brands’ claims rest on WQA and IAPMO R&T, as their sheets print.

That split matters when the sheet is vague. PUR’s sheet says both filters “have been tested according to NSF/ANSI 42, 53 and 401” but names WQA only above the lead table, so “WQA certified to 401” is not something PUR has said. ZeroWater’s sheet prints “53 or 42” and no 401 line, and ZeroWater’s certification page names IAPMO without any standard number.

What does ZeroWater’s 000 reading prove?

ZeroWater’s FAQ says the meter should read 000 in filtered water, that the filter removes approximately 99.6% of detectable TDS, and that the filter is due when the reading reaches 006. All three statements are about total dissolved solids: the minerals and salts a conductivity pen estimates, which NSF files under the aesthetic standard 42.

A lead or PFAS result lives on a different scale. The TDS meter guide shows why: EPA’s lead action level of 15 parts per billion sits far below what a consumer conductivity pen resolves, so a 000 reading and a lead result at that level can describe the same glass. ZeroWater’s certified lead and PFOA/PFOS rows are real, but they come from the IAPMO R&T sheet, not from the meter.

The 000 also costs gallons. Ion exchange that removes virtually all detectable dissolved solids exhausts at 15 gallons on the sheet, against 120 for the Brita Elite, and ZeroWater’s FAQ says the life varies with local water chemistry. On hard or high-TDS tap water the 006 reading arrives sooner. For chlorine or chloramine taste without a lead or PFAS result, the chlorine and chloramine guide covers the cheaper fix.

What should you do first?

1. Read the lead row of the sheet for the filter already in the pitcher: Brita Standard and PUR PPF900Z have none, so a lead result means the upgraded cartridge, not a new brand.
2. Match the cartridge to the pitcher on the parts page for that brand before ordering; the Elite skips the Stream line and the PPF951K list runs to 14 models.
3. Count gallons, not months: a household pouring Brita’s 2-gallon daily maximum empties a 40-gallon Standard in 20 days and a 15-gallon ZeroWater in about a week.
4. Keep the TDS pen for what it does: a rising reading tells you the ZeroWater filter is spent at 006, and nothing else.
5. When the gallons run out faster than the budget allows, the upgrade path is an under-sink unit, not a bigger pitcher.

Frequently asked questions

Sources

1. Brita, Performance Data Sheet, Elite Filter OB06 (PDF) (manufacturer or vendor document)
2. Brita, Performance Data Sheet, Standard Filter OB03 (PDF) (manufacturer or vendor document)
3. Brita, Elite replacement filters product page (manufacturer or vendor document)
4. Brita, Original replacement filters product page (manufacturer or vendor document)
5. PUR, Performance Data Sheet, PPF951K vs PPF900Z, 2024 revision (PDF) (manufacturer or vendor document)
6. PUR, Replacement filters page (manufacturer or vendor document)
7. PUR, PUR Pitcher Filter PPF900Z product page (manufacturer or vendor document)
8. Zero Technologies, Performance Data Sheet for all IAPMO-certified devices, 1 December 2023 (PDF) (manufacturer or vendor document)
9. ZeroWater, Frequently asked questions (manufacturer or vendor document)
10. ZeroWater, Performance and Certification page (manufacturer or vendor document)
11. NSF, NSF/ANSI 42, 53 and 401 Filtration Systems Standards (PDF fact sheet) (standards or certification body)
12. NSF, Certified Drinking Water Treatment Units listings, trade name PUR (standards or certification body)
13. NSF, Certified Drinking Water Treatment Units listings, trade name Brita (standards or certification body)
14. EPA, Lead and Copper Rule (government or regulatory source)