Contaminant · Cysts (Cryptosporidium, Giardia)

What water filters remove cysts like cryptosporidium and giardia

Cysts (Cryptosporidium, Giardia)

verified 2026-09-20
sources 1

The short answer

Cysts (Cryptosporidium, Giardia) reduction is certified under NSF/ANSI 53, NSF/ANSI 58 and NSF P231.

Of the 1 system in our database that advertise cysts like cryptosporidium and giardia reduction, 1 holds a matching third-party listing.

  • NSF/ANSI 53NSF/ANSI 53 permits this claim, but no system we hold carries it under that standard.
  • NSF/ANSI 581 of the 1 certified systems we hold carry this claim under NSF/ANSI 58.
  • NSF P2311 of the 1 certified systems we hold carry this claim under NSF P231.

Regulatory status · United States

Current federal limit
Treatment technique, no numeric limit
Cysts (Cryptosporidium, Giardia).
Status
✓In force, treatment technique
Pending change
None recorded.
As of
20 Sep 2026
Primary source: U.S. EPA

Settled. We re-check the federal register entry quarterly and stamp this panel with the date of the last check.

Certified to reduce Cysts (Cryptosporidium, Giardia)

1 system

Every row below has a matching listing in a certifier database, checked on 20 Sep 2026. Sorted by FilterSpecs score.

Table 1 · Certified Cysts (Cryptosporidium, Giardia) reduction
System Score Reduction Standard Price
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System 5.9 Not published NSF/ANSI 58 $259.99

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Reduction figures are the certified performance in the listing, not manufacturer marketing. See methodology.

Sources

  1. [1] U.S. EPA. Cysts (Cryptosporidium, Giardia) drinking water standard. retrieved 2026-09-20
5.9 · GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System top certified pick Buy · $249.00