Water Lab Results
Water Lab Results
Sentry H2O, the maker of the filters we sell, has had independent labs test treated and untreated water. We host those reports here so you can read them without leaving Ready Pantry.
The results below are from tests Sentry arranged. They are not a guarantee of the same outcome in every home.
Please read this first. Results vary by water source, system configuration, and conditions. These filters are for everyday tap water. They are not a substitute for official boil-water or do-not-drink advisories from your local authorities. Keep a stored supply of emergency drinking water for outages and emergencies.
VOC and trihalomethane test, May 2026
Independent drinking-water testing compared untreated and treated samples collected at the same location. SimpleLab, Inc. handled kitting, logistics, and support. The results were presented in Tap Score reports. Microbac Laboratories performed the analysis using EPA method 524.2.
All four individual THMs found in the untreated sample (chloroform, bromodichloromethane, dibromochloromethane, and bromoform) were also reported as not detected after treatment.
- Untreated sample MJC5ZT, labeled “Bathroom Sink w/out System,” collected May 6, 2026, reported May 14, 2026.
- Treated sample U6AE3F, labeled “Bathroom Sink w/System,” collected May 5, 2026, reported May 14, 2026.
Download the VOC and THM lab summary (PDF)
Vinyl chloride test, May 2023
Summit Environmental Technologies, Inc. tested East Palestine water samples for vinyl chloride in May 2023. The work included untreated lab controls, treated samples used to verify vinyl chloride recovery, and a treated sample that was not spiked.
In the treated, non-spiked water sample, vinyl chloride was reported as ND (not detected). The maximum acceptable contaminant level listed in that report was 5.0 μg/L.
- Download the vinyl chloride lab report (PDF, English)
- Download the vinyl chloride lab report (PDF, Spanish)
PFAS results
Sentry has said updated PFAS test results are coming. We will add them to this page when they are available. We are not publishing PFAS reduction percentages until those results are in hand.
Filtration media data sheets
These technical sheets describe the media blends used in Sentry systems. They explain the intended role of each stage; they are not the same thing as a finished-system lab report.
ToxyGuard
Sentry describes ToxyGuard as defending against common contaminants with comprehensive toxin removal, scale control, and added oxygen. It is used in DualGuard, TriGuard, the standard Portable system, and the city Whole House system.
AlkaGuard
Sentry describes AlkaGuard as enriching water with minerals such as calcium and magnesium and supporting increased alkalinity. It is the second stage in DualGuard, TriGuard, and Portable systems, and is included with the under-sink system that ships with the Whole House package.
BioChemGuard
Sentry describes BioChemGuard as targeted treatment for biological and chemical contaminants, including bacteria, pathogen-based viruses, and PFAS/PFOS. It is the third stage in TriGuard and is used in the Premium Portable filter set.
WellGuard
Sentry describes WellGuard as built around common well-water concerns such as iron, manganese, nitrates, arsenic, hydrogen sulfide, and sediment. It is used in Sentry’s well-water whole-house configuration.
Not sure which filter fits your home? Start with Find the Right Water Filter.