The evidence
Each criterion with what we found, where we found it and when. Anything we could not confirm says so.
NTH criteria
NTH Framework v1.2. Score 60.6 (raw 45.8 of 100), calibrated so the best hotel in this edition (Santa Monica Proper Hotel) reads 90. Evidence retrieved 2026-10-22.
Sleep5.0 / 24
The room as an instrument for deep, uninterrupted, circadian-aligned rest.
Mattress & sleep system
Hotel-reported · in the best room
Eco-conscious, luxury sustainable mattresses; materials not disclosed.
Bedding & textiles
Hotel-reported · in the best room
100% sustainably sourced bedding.
Sleep programme & pillow menu
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 3 pts
Unknown
Blackout
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Circadian & warm evening lighting
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
In-room red light
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Acoustic quiet
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 4 pts
Unknown
EMF & Wi-Fi-off options
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Air8.0 / 12
What you breathe for eight hours a night: filtered, fresh, smoke-free and unperfumed.
In-room purification
Hotel-reported · in the best room
HEPA air filters listed as a guest-room feature.
Ventilation & building standard
Hotel-reported · across the property
LEED Gold; HVAC with energy recovery; innovative ventilation.
Smoke-free policy
Hotel-reported · across the property
Smoking fee per room implies non-smoking rooms; terraces not addressed.
Fragrance-free & low-allergen rooms
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Water10.0 / 12
Clean water to drink, and to shower and bathe in.
Filtered drinking water
Hotel-reported · in the best room
Filtered water in all sinks.
Shower & bath filtration
Hotel-reported · in the best room
Filtered water in all showers.
Gentler pool & hydrotherapy water
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Nourishment2.0 / 10
Food and drink that heal rather than merely please.
Organic & local sourcing
Hotel-reported · across the property
Regional farmers and makers; Waav organic smoothie cubes.
Clean-ingredient standard
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 3 pts
Unknown
Clean minibar & in-room hydration
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Nutrition guidance
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 1 pts
Unknown
Movement7.6 / 10
The means to train, stretch and move, indoors and out.
Gym completeness
Hotel-reported · across the property
Field House gym with Peloton Bikes and Treads; hours not stated.
Classes & studios
Hotel-reported · across the property
Complimentary weekly group classes, yoga, meditation; daily ONEYOGAHOUSE classes.
Swimming
Hotel-reported · across the property
Rooftop pool (earlier NTH research).
0.6 / 1 pts
From press coverage (counts at 60%)
NTH NYC guide, prior research (cited 1 Hotel amenities page; not shown on 2026-10-22 fetch)
Outdoor activity
Hotel-reported · across the property
Park and botanic-garden walks suggested.
Holistic Wellness4.0 / 19
Healing traditions and the recovery technology that complements them.
Spa facility
Hotel-reported · across the property
Bamford Wellness Spa.
Traditional & integrative modalities
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 4 pts
Unknown
Mind & breath
Hotel-reported · across the property
Guided meditation and sound meditation (ONEYOGAHOUSE).
Heat therapy
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Cold therapy
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Photobiomodulation & PEMF
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Clinical longevity (IV, HBOT, diagnostics)
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 4 pts
Unknown
Materials & Setting9.2 / 13
What touches the skin and surrounds the stay: finishes, products, cleaning, and the landscape beyond the door.
Natural, low-VOC finishes
Hotel-reported · in the best room
Reclaimed flooring, hand-chiselled stone, Domino Sugar Factory timber.
Clean bath & body amenities
Hotel-reported · in the best room
Bamford bath products (earlier NTH research).
1.2 / 2 pts
From press coverage (counts at 60%)
NTH NYC guide, prior research (cited 1 Hotel amenities page; not shown on 2026-10-22 fetch)
Non-toxic spa & nail products
Hotel-reported · across the property
All-natural Bamford treatments; organic skincare.
Non-toxic housekeeping & plastic-free operations
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Green & blue space
Hotel-reported · across the property
In Brooklyn Bridge Park; green roof.
Walkability & low-impact mobility
Hotel-reported · across the property
Walkable park access.
Our review
At a glance
- Fragrance
- 5 not yet reviewed
- Air
- 1 hotel-reported, 4 not yet reviewed
- Cleaning & care
- 4 not yet reviewed
- Sleep & materials
- 5 not yet reviewed
- Water & pools
- 4 not yet reviewed
- Food
- 2 not yet reviewed
- Light & quiet
- 2 not yet reviewed
- Building
- 1 hotel-reported, 2 not yet reviewed
One reported by the hotel; the rest not yet reviewed.
1 hotel-reported24 of 25 not yet reviewed
Counts cover the 25 scored criteria; the other 5 windows are context.
Checked
Read the full profileThe ledger
Fragrance
Added scent is the most common complaint from sensitive guests, and the hardest thing to see on a booking page.
No added fragrance in rooms
Not yet reviewed.
No scent marketing
Not yet reviewed.
Fragrance-free laundry
Not yet reviewed.
Unscented bath products
Not yet reviewed.
So far, the hotel says: Rooms have Bamford bath products.
Our note. Whether an unscented option is offered is not stated.
How we know
What we look for. Fragrance-free toiletries in the room by default, or on request.
Why it matters. Fragrance ingredients are among the most frequent causes of allergic contact reactions to cosmetics. An unscented option lets sensitive guests use what is provided instead of packing their own.
Source: EU Scientific Committee on Consumer Safety, Opinion on fragrance allergens in cosmetic products ()
Source 1: Hotel website: services and amenitiesUndated · read 22 Oct 2026
Unscented spa options
Not yet reviewed.
So far, the hotel says: Spa treatments use Bamford products ‘made from natural and organic ingredients’.
Our note. Whether treatments are available without essential oils or scent is not stated. The spa shop sells signature candles.
How we know
What we look for. Treatments, saunas and steam rooms available without essential oils or scent infusions.
Why it matters. Essential oils are fragrance: the EU’s scientific committee lists several natural extracts, as well as single fragrance chemicals, among established contact allergens. A shared sauna with a scent infusion is hard to avoid.
Source: EU Scientific Committee on Consumer Safety, Opinion on fragrance allergens in cosmetic products ()
Source 2: Hotel website: Bamford Wellness SpaUndated · read 22 Oct 2026
Know something about fragrance here that we don’t? Tell us
Air
What you breathe for eight hours a night: smoke history, fresh air, filtration and anything burning in the room.
Smoke-free property
Hotel-reportedacross the property
The hotel says: ‘No, we do not allow smoking in rooms or on property.’
Our note. The booking policy also sets a smoking fee of $350 per room and $500 per suite.
How we know
What we look for. No smoking in any guest room, balcony or indoor space.
Why it matters. Tobacco smoke leaves a residue (thirdhand smoke) on surfaces and in dust. A study of California hotels found that non-smoking rooms in hotels that allow smoking elsewhere did not protect non-smoking guests from it.
Source: Matt et al., Tobacco Control, Thirdhand smoke and exposure in California hotels: non-smoking rooms fail to protect non-smoking hotel guests from tobacco smoke exposure ()
Source 3: Hotel website: FAQsUndated · read 22 Oct 2026
Opening windows
Not yet reviewed.
Filtered fresh air
Not yet reviewed.
So far, the hotel says: The building has HVAC systems with energy recovery and what the hotel calls ‘innovative ventilation systems’.
Our note. Filter ratings are not stated, so this falls short of the criterion.
How we know
What we look for. Mechanical ventilation brings outdoor air in through filters rated MERV 13 or better.
Why it matters. Fine particles (PM2.5) are linked to respiratory and cardiovascular harm. A MERV 13 filter captures at least half of the smallest particles it is rated for and most larger ones, and a steady supply of fresh air dilutes pollutants released indoors.
Source: US EPA, What is a MERV rating? ()
Source 4: Hotel website: sustainabilityUndated · read 22 Oct 2026
In-room air purifier
Not yet reviewed.
So far, the hotel says: ‘HEPA Air Filters’ are listed among the features every room includes.
Our note. Whether these are standalone purifiers or part of the room’s air handling, and whether any has an ozone or ionizing function, is not stated, so this falls short of the criterion.
How we know
What we look for. A true-HEPA purifier in the room or on request, with no ozone-generating or ionizing function.
Why it matters. Portable HEPA units lower indoor particle levels, which matters most during wildfire smoke. Ionizers and ozone purifiers can add an irritant gas instead.
Sources: US EPA, Guide to air cleaners in the home (undated); US EPA, Ozone generators that are sold as air cleaners ()
Source 5: Hotel website: roomsUndated · read 22 Oct 2026
No in-room combustion
Not yet reviewed.
Know something about air here that we don’t? Tell us
Cleaning & care
How a room is cleaned, treated and prepared, and whether a request for a gentler clean is actually honored.
Low-chemical housekeeping
Not yet reviewed.
So far, the hotel says: The property is sanitized with ‘hospital-grade, EPA-approved agents and activated oxygen spray bottles’.
Our note. Whether products are unscented, and a product list, are not published, so this falls short of the criterion.
How we know
What we look for. Unscented, low-hazard cleaning products and no aerosols, with a product list the hotel will share.
Why it matters. In a ten-country study, weekly use of household cleaning sprays was linked to new asthma symptoms in adults. Residue and scent from cleaning also linger for the next guest.
Source: Zock et al., American Journal of Respiratory and Critical Care Medicine, The use of household cleaning sprays and adult asthma: an international longitudinal study ()
Source 3: Hotel website: FAQsUndated · read 22 Oct 2026
No ozone or biocide treatments
Not yet reviewed.
Low-chemical pest control
Not yet reviewed.
Sensitive-guest preparation
Not yet reviewed.
Know something about cleaning & care here that we don’t? Tell us
Sleep & materials
The textiles, mattress and floor you spend the night closest to, and how allergen-aware the room is.
Tested or organic bed linen
Not yet reviewed.
So far, the hotel says: Rooms have ‘eco-conscious mattresses with 100% sustainably sourced bedding’.
Our note. No certification is named, so this falls short of the criterion.
How we know
What we look for. Sheets and towels certified to a residue-testing standard such as OEKO-TEX Standard 100, or certified organic.
Why it matters. Certifications such as OEKO-TEX Standard 100 test the finished fabric, down to the thread, against a list of restricted substances, which lowers skin exposure over a night’s sleep.
Source: OEKO-TEX, OEKO-TEX Standard 100 (undated)
Source 1: Hotel website: services and amenitiesUndated · read 22 Oct 2026
Mattress materials disclosed
Not yet reviewed.
So far, the hotel says: The hotel provides ‘non-toxic, organic mattresses’.
Our note. What they are made of, how they are certified and how they meet flammability rules are not specified, so this falls short of the criterion.
How we know
What we look for. The hotel says what its mattresses are made of and how flame-retardancy is achieved.
Why it matters. Flame retardants have been added to mattresses and seating foam, and the US National Institute of Environmental Health Sciences lists possible effects including endocrine and thyroid disruption. How much a mattress adds to anyone’s exposure is still debated; disclosure lets guests choose.
Source: US National Institute of Environmental Health Sciences, Flame retardants (undated)
Source 6: Hotel website: home pageUndated · read 22 Oct 2026
Hard floors
Not yet reviewed.
So far, the hotel says: Rooms have ‘sustainably-sourced reclaimed flooring’.
Our note. Whether rooms also have carpet or rugs is not stated.
How we know
What we look for. Hard, cleanable floors in guest rooms rather than wall-to-wall carpet.
Why it matters. Dust mites live in carpet, and US health guidance for allergic sleepers is to replace wall-to-wall carpet in bedrooms with bare floors, which can be cleaned completely between guests.
Source: US National Institute of Environmental Health Sciences, Dust mites and cockroaches (undated)
Source 5: Hotel website: roomsUndated · read 22 Oct 2026
Allergy-friendly rooms
Not yet reviewed.
Pet-free rooms
Not yet reviewed.
So far, the hotel says: Pets are welcome, with a $250 cleaning fee if a room is left dirty.
Our note. Whether any rooms are kept pet-free is not stated.
How we know
What we look for. Rooms or floors where animals are never allowed, cleaned to a separate routine.
Why it matters. Pet allergen can stay on carpets and furniture for months and travels on clothing. For allergic guests a room animals never enter matters more than any amenity.
Source: US National Institute of Environmental Health Sciences, Pet allergens (undated)
Source 7: Hotel website: policiesUndated · read 22 Oct 2026
Know something about sleep & materials here that we don’t? Tell us
Water & pools
Drinking water, shower water and pool air.
Filtered or tested drinking water
Not yet reviewed.
So far, the hotel says: Each guest room has a water tap built into the wall ‘equipped with a water filtration system’, and the building has a base-building filtration system for drinking water.
Our note. The filter type, and how often filters are changed or the water tested, are not stated, so this falls short of the criterion.
How we know
What we look for. Drinking water filtered at the tap or refill station, or treated and tested on site, with filters or tests on a schedule.
Why it matters. Public water systems in California are regulated and monitored by the State Water Board, though older building plumbing can still affect what reaches the tap. Filtration mainly improves taste and removes chlorine, and it replaces single-use bottles; private wells need regular testing.
Source: California State Water Resources Control Board, Division of Drinking Water (undated)
Source 3: Hotel website: FAQsUndated · read 22 Oct 2026
Water safety plan
Not yet reviewed.
Shower filters
Not yet reviewed.
So far, the hotel says: ‘Filtered water in all sinks and showers’ is listed among the in-room amenities.
Our note. The filter type, and whether it reduces chlorine or chloramine, is not stated, so this falls short of the criterion.
Shown for information; not scored.
How we know
What we look for. Shower filters that reduce chlorine or chloramine, in rooms or on request.
Why it matters. Some guests with sensitive skin prefer less chlorine in shower water. The health evidence is limited, so we list this as a comfort feature.
Source 1: Hotel website: services and amenitiesUndated · read 22 Oct 2026
Comfort feature, not scored.
Outdoor or low-chloramine pools
Not yet reviewed.
So far, the hotel says: The rooftop plunge pool is open daily from 7am to 7pm, weather permitting.
Our note. The hotel does not say in so many words that the pool is open-air, or how its water is treated, so this is context only.
Shown for information; not scored.
How we know
What we look for. Pools are outdoors, or indoor pools have dedicated ventilation and monitored combined chlorine.
Why it matters. Chloramines irritate the skin, eyes and airways, and they build up in the air of indoor pools without enough ventilation. Outdoor pools, and good ventilation for indoor ones, keep levels low.
Source: US CDC, Chloramines and pool operation ()
Source 8: Hotel website: rooftop poolUndated · read 22 Oct 2026
Context, not scored: almost every pool in this catalog is outdoors, so it says little about one hotel against another.
Know something about water & pools here that we don’t? Tell us
Food
Allergen care first; where the produce comes from second.
Allergen-aware kitchen
Not yet reviewed.
Garden or organic produce
Not yet reviewed.
So far, the hotel says: Ingredients in the hotel’s restaurants and in-room dining are ‘organic and sustainably sourced from local purveyors’.
Our note. The answer names a restaurant the hotel no longer lists, and no certification or share of produce is given.
Shown for information; not scored.
How we know
What we look for. A meaningful share of the kitchen’s produce is grown on site or certified organic.
Why it matters. A large review found detectable pesticide residues about four times as often in conventional crops as in organic ones. Over a short stay the difference in exposure is small, so we show this as a note on the kitchen, not a scored health factor.
Source: Barański et al., British Journal of Nutrition, Higher antioxidant and lower cadmium concentrations and lower incidence of pesticide residues in organically grown crops: a systematic literature review and meta-analyses ()
Source 3: Hotel website: FAQsUndated · read 22 Oct 2026
Kitchen note, not scored.
Know something about food here that we don’t? Tell us
Light & quiet
Darkness and silence at night, and radio-quiet options for guests who want them.
Darkness and quiet
Not yet reviewed.
Radio-quiet options
Not yet reviewed.
Shown for information; not scored.
Know something about light & quiet here that we don’t? Tell us
Building
The materials a hotel was built and renovated with, how it handles damp, and what third parties have certified.
Low-emitting materials
Not yet reviewed.
So far, the hotel says: Over half of the hotel is built from regional and reclaimed materials, including heart pine beams from the former Domino Sugar Factory.
Our note. Emissions from paints, adhesives, finishes and flooring are not described, so this falls short of the criterion.
How we know
What we look for. Low-VOC paints, adhesives, finishes and flooring specified in construction or renovation.
Why it matters. Paints, varnishes and adhesives release volatile organic compounds, formaldehyde among them, most heavily when new. Low-emitting products reduce that load.
Source: US EPA, Volatile organic compounds’ impact on indoor air quality ()
Source 6: Hotel website: home pageUndated · read 22 Oct 2026
Leak and mold response
Not yet reviewed.
Building certification
Hotel-reportedacross the property
The hotel says: ‘This urban oasis is LEED Certified Gold.’
Our note. Not yet checked against the USGBC directory. LEED is mainly an environmental certification, and no year is given.
Shown for information; not scored.
How we know
What we look for. A third-party certification such as WELL, LEED or a green business program, recorded with its level, and its year where the certifier gives one.
Why it matters. WELL assesses air, water and light in occupied buildings. LEED and green business programs are mainly environmental, with some indoor-quality elements. A certificate records what was designed or checked at a point in time, not what a room is like today.
Source 4: Hotel website: sustainabilityUndated · read 22 Oct 2026
Context only. A certificate supports specific criteria only where its scope covers them.
Know something about building here that we don’t? Tell us
Notes & sources
- Hotel website: services and amenities, Undated · read 22 Oct 2026
- Hotel website: Bamford Wellness Spa, Undated · read 22 Oct 2026
- Hotel website: FAQs, Undated · read 22 Oct 2026
- Hotel website: sustainability, Undated · read 22 Oct 2026
- Hotel website: rooms, Undated · read 22 Oct 2026
- Hotel website: home page, Undated · read 22 Oct 2026
- Hotel website: policies, Undated · read 22 Oct 2026
- Hotel website: rooftop pool, Undated · read 22 Oct 2026
Room count: Per the hotel’s website, guest rooms and suites together. Hotel website (opens the hotel’s website)
Photographs: 1 Hotel Brooklyn Bridge; 1 Hotel Brooklyn Bridge; 1 Hotel Brooklyn Bridge; 1 Hotel Brooklyn Bridge; 1 Hotel Brooklyn Bridge; 1 Hotel Brooklyn Bridge
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