Post Ranch Inn at a glance
Post Ranch Inn is a guest-house stay in Big Sur, California, USA. We read what it publishes about the eight things a building does to your biology and scored the evidence 11 of 24. Last verified 2026-08-06. Air Quality is its best-documented pathway; nothing is published on EMF Harmony.
Each pathway scores 0 to 3 on the quality of the evidence published, not on the quality of the property. Open a row for every claim and its source.
Air Quality at Post Ranch Inn: Specified (2/3)
2Specified, 2 of 3.
Specified2 of 3 · Filtration, ventilation and what the air is measured at.
What the evidence shows
- Specified
Filtration in public spaces is published as HEPA, which is itself a defined efficiency classification. The specific class is not stated, and no filtration is described for guest rooms.
HEPA air filters are used in all public spaces.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06. - Claimed
The property states it runs an indoor air quality management plan including maintenance and monitoring and retains an indoor air quality adviser, with no method, standard or reading published.
The property implements an indoor air quality management plan to ensure guests' well-being, including maintenance and monitoring. In addition, Post Ranch has retained an indoor air quality expert, who advises Post Ranch on the many ways to maximize fresh air in the rooms and throughout all indoor public spaces.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06.
What is not published
- What filter grade is fitted to guest room air handling, for example MERV 13 or HEPA H13?
- What is the fresh air supply rate per person in a guest room?
- Are carbon dioxide, particulate or volatile organic compound levels measured, and are the readings published?
- Is there a mould inspection and remediation protocol, and when was it last run?
- Are there gas cooktops, fireplaces or other combustion sources inside guest rooms?
Water Integrity at Post Ranch Inn: Specified (2/3)
2Specified, 2 of 3.
Specified2 of 3 · Source, treatment, tested panels and how drinking water arrives.
What the evidence shows
- Specified
All water is drawn and treated from seven wells on the property, with usage measured daily and quality tested weekly, and no contaminant panel, laboratory or result published.
All water used at Post Ranch Inn is sourced and treated via the seven wells located on property. That includes drinking water, water used in guestrooms, Sierra Mar, maintenance, laundry, etc. Usage is measured daily and quality is monitored and tested weekly.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06. - Specified
The property publishes that it created the first commercial greywater system approved in Monterey County, with no treatment train or output specification published.
Post Ranch Inn created the first commercial greywater system approved in Monterey County.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06. - Claimed
Drinking water reaches guest rooms in refillable glass bottles rather than single use plastic, with no room level filtration described.
Refillable glass water bottles are used in lieu of plastic.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06.
What is not published
- What is the water source, and what treatment is applied before it reaches a guest room?
- Is there a published contaminant test panel, and which laboratory ran it?
- Is shower and bath water filtered, and to what specification?
- How are pools and spas sanitised, and is the chemistry published?
- How is drinking water delivered, and is it treated on site?
Light Rhythm at Post Ranch Inn: Claimed (1/3)
1Claimed, 1 of 3.
Claimed1 of 3 · Circadian lighting specification, flicker, blackout and daylight.
What the evidence shows
- Claimed
Tree House rooms are published as having a skylight positioned over the bed.
Plus, add some extra magic to your evenings by doing a little star gazing through the skylight over the bed.
PublishedPost Ranch Inn, Tree House. Checked 2026-08-06. Archived copy from 2026-08-06. - Claimed
South facing guestroom windows are tinted and ocean facing windows carry a protective film, with no glazing specification or light transmittance published.
South-facing windows in guestrooms have been tinted to lower energy use. A protective film has been placed on ocean-facing windows to reduce the sun's harmful effects, maintain room comfort, and save energy.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06. - Claimed
Lighting throughout the property is described as LED and low voltage, with no colour temperature, tunability or flicker performance published.
LED and low-voltage lighting are used throughout the property.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06.
What is not published
- Is guest room lighting tunable or circadian, and what specification is published?
- What colour temperatures are used in the evening, and are fixtures flicker free?
- Do sleeping areas have full blackout, and is it specified?
- What daylight access does a typical room have?
- Is exterior lighting shielded or reduced overnight?
EMF Harmony at Post Ranch Inn: Not published (0/3)
0Not published, 0 of 3.
Not published0 of 3 · Wired versus wireless topology, and what is measured where people sleep.
We looked for published information on EMF Harmony and found none. That is a gap in the public record, not a finding about the property.
What is not published
- Are guest rooms wired for data, or is access wireless only?
- Where are wireless access points and smart meters placed relative to the bed?
- Have field levels been measured in sleeping areas, and by whom?
- Can a guest have wireless disabled in their room on request?
- Is any shielded cabling or shielding material specified in the build?
Materials and Textiles at Post Ranch Inn: Specified (2/3)
2Specified, 2 of 3.
Specified2 of 3 · Named materials, finishes, bedding composition and cleaning chemistry.
What the evidence shows
- Specified
The property announced in 2020 that daily cleaning uses ACT.Global ECA Water, an electrically activated salt and water solution produced on site, which the announcement identifies as the EPA registered disinfectant Annihilyte-1, number 92449-1. That registration is held by Annihilare Medical Systems and certifies the product as sold, not anything measured at this property.
The second step, which ACT.Global refers to as ECA Water, follows CDC guidelines, is Green Seal approved, and is an EPA-registered disinfectant under the name Annihilyte-1 (#92449-1).
PublishedPost Ranch Inn, Big Sur's Post Ranch Inn Announces Non-Toxic, Sustainable Hygiene Solution And A More Holistic Approach To Hospitality (self-issued release, 28 July 2020, distributed by PR Newswire). Checked 2026-08-06. Archived copy from 2026-08-06. - Specified
The property announced in 2020 that indoor surfaces exposed to light were treated with ACT CleanCoat, a photocatalytic coating the announcement states holds for twelve months after application. No surface or air test result is published for the property, and no reapplication since 2020 is published.
The first step of Premium Purity is to apply the non-toxic ACT CleanCoat to ALL indoor surfaces exposed to light, rendering them self-disinfecting through photocatalysis, which decomposes microorganisms including bacteria, molds, and viruses, as well as VOCs, resulting in anti-microbial surfaces and cleaner air for 12 months after initial application.
PublishedPost Ranch Inn, Big Sur's Post Ranch Inn Announces Non-Toxic, Sustainable Hygiene Solution And A More Holistic Approach To Hospitality (self-issued release, 28 July 2020, distributed by PR Newswire). Checked 2026-08-06. Archived copy from 2026-08-06. - Claimed
Adhesives, paints, coatings and carpeting are described as low emitting, with no product, brand or emissions standard named and no VOC limit published.
Post Ranch uses low-emitting materials to reduce indoor air contaminants' amount, including adhesives, paints, coatings, and carpeting.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06. - Specified
Guestroom walls use reclaimed wood, including old growth redwood taken from wine casks.
Reclaimed wood, including old-growth redwood from old wine casks, adds a rich, deep red color to many guestroom walls.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06. - Claimed
Sheets and towels are stated to be custom made without harmful chemicals or dyes, with no fibre content, supplier or certification named.
Sheets and towels are custom-made, using no harmful chemicals or dyes.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06. - Claimed
Room feature lists describe the bed as carrying an organic mattress, with no brand, fill, certification or flame retardant treatment published.
King bed with organic mattress
PublishedPost Ranch Inn, Ocean House. Checked 2026-08-06. Archived copy from 2026-08-06. - Claimed
Laundry detergent is described as biodegradable and hypoallergenic with botanical ingredients, with no product named.
Laundry detergent is biodegradable and hypoallergenic, with botanicals and active herbal ingredients.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06.
What is not published
- What are the mattresses made of, and are they treated with flame retardants?
- What is the fibre content of the linen, and is it certified, for example to GOTS or OEKO TEX?
- Which paints, adhesives and sealants were specified, and are they low emission?
- What cleaning and laundry products are used, and is the list published?
- Are there named low emission certifications on the flooring or joinery?
Food and Kitchen at Post Ranch Inn: Specified (2/3)
2Specified, 2 of 3.
Specified2 of 3 · Sourcing, on site growing, cookware, kitchen water and additive discipline.
What the evidence shows
- Specified
An on site Chefs' Garden supplies produce, vegetables and herbs to the kitchen, with no share of total supply published.
The on-site Chefs' Garden provides fresh produce, vegetables, and herbs for our guests to enjoy.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06. - Claimed
The restaurant states it serves free range beef and poultry and organic seasonal vegetables and fruit, with no supplier list, certifier or verified share published.
Post Ranch's award-winning restaurant Sierra Mar supports small producers and the regional economy by serving all-natural free-range beef and poultry and fresh, on-site, or locally-grown seasonal organic vegetables and fruit.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06.
What is not published
- What share of produce is grown on site or sourced locally, and is it verified?
- Which cooking oils are used, and is the policy published?
- What cookware is used in the kitchen?
- Is kitchen and ice water filtered, and to what specification?
- Is there a published position on additives, preservatives or allergens?
Biophilic and Healing Design at Post Ranch Inn: Specified (2/3)
2Specified, 2 of 3.
Specified2 of 3 · Nature access, views, volume and natural material contact, designed with intent.
What the evidence shows
- Specified
Ocean Houses are earth sheltered with sod roofs and Tree Houses are raised on nine foot stilts to avoid the root balls of nearby redwood and oak trees.
The earth-sheltered Ocean Houses with sod roofs blend into the landscape and reduce heat loss. The stilted 9 ft. Tree Houses were designed to protect the fragile root balls of nearby redwood and oak trees.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06. - Specified
The property publishes the design intent behind its architecture, attributing the organic architecture approach to Mickey Muennig.
Mickey's revolutionary innovative design utilized organic architecture intending for guests to feel a part of nature, not just observers of it.
PublishedPost Ranch Inn, The Ranch. Checked 2026-08-06. Archived copy from 2026-08-06. - Specified
Ocean House rooms are freestanding structures with curved living roofs planted with grass and wildflowers and outward ocean views.
Become one with nature with these freestanding rooms, offering curved, living roofs covered with grass and wildflowers, along with panoramic ocean views.
PublishedPost Ranch Inn, Ocean House. Checked 2026-08-06. Archived copy from 2026-08-06. - Claimed
Landscaping is described as native and drought tolerant planting tended with organic fertiliser, with no species palette published.
Water-efficient landscaping is used, focusing on native and drought-tolerant plants that are tended with organic fertilizer.
PublishedPost Ranch Inn, Sustainability. Checked 2026-08-06. Archived copy from 2026-08-06.
What is not published
- Does every guest room have direct outdoor access or an operable opening?
- What is the published design intent behind the natural materials used?
- What are the typical ceiling heights and room volumes?
- Was the landscape designed with native planting, and is the palette published?
Sound and Sensory Ecology at Post Ranch Inn: Not published (0/3)
0Not published, 0 of 3.
Not published0 of 3 · Measured background noise, separation between keys, and scent load.
We looked for published information on Sound and Sensory Ecology and found none. That is a gap in the public record, not a finding about the property.
What is not published
- What is the measured background noise level in a guest room at night?
- What acoustic separation is specified between adjoining keys?
- How loud is the guest room air conditioning at its lowest setting?
- Is fragrance diffused into guest rooms or public areas, and can it be declined?
38 open questions could be answered with information this property already holds. Answer these for this property
Best for, and not ideal for
Not ideal for
- anyone who needs EMF data: nothing is published
- light sleepers: nothing is published about the sound environment
Where you’ll be
Big Sur, California, USA
36.2303, -121.7718 · Open the full map · © OpenStreetMap contributors
What is not publishedthe gaps we looked for and did not find
Tree House rooms are published as containing a wood-burning fireplace, a combustion source inside the guest room envelope, and nothing is published on flue design, room ventilation or particulate levels alongside it. Nothing is published on network topology, access point placement or field levels in sleeping areas, so EMF Harmony is empty. Nothing is published on background noise levels, separation between keys, mechanical noise or fragrance load, so Sound and Sensory Ecology is empty. No contaminant panel, laboratory or test result is published for the well water, no filter grade is published for the HEPA units, no guest room filtration is described, and no circadian, colour temperature, flicker or blackout specification is published.
Other standards held
Useful context. A held standard does not move a pathway score on its own. It moves a score only through the evidence that standard publishes.
- Beyond Green Awarded by Beyond Green, Preferred Travel Group. Source
Regional context2 public figures about the area, none of which scores
Public data about the surrounding area. None of it contributes to the score, because a property cannot be marked down for the conditions outside it.
- Safely managed drinking water, USA: The World Health Organization reports 98 per cent of the population nationally, 98 per cent in urban areas using a safely managed drinking water service. This describes the country, not this property, and says nothing about what reaches a guest room here. It is recorded because it is the background against which a property's own treatment is worth publishing. Source
- Ambient PM2.5 and PM10 near Big Sur, California, USA: Modelled ambient air over this location averaged 42.9 micrograms per cubic metre of PM2.5 and 45.9 of PM10 across the 720 hours to 2026-08-17, peaking at 601.6 PM2.5. The World Health Organization annual guideline for PM2.5 is 5. This is the outdoor air over the area, modelled rather than measured on site, and it is not a reading of the air inside any room. Source
Verification recordwho checked this, how, and when
Verification record
- Method
- Desk research of published sources, each claim cited
- Reviewed by
- Certified Spaces Standards Inc.
- Last verified
- 2026-08-06
- Changes
- Every correction is logged
Not published is not unsafehow to read these scores, and what this index does not promise
A low score means a property has not published information. It does not mean the property is unsafe, unhealthy or poorly run.
These scores measure disclosure. These scores describe disclosure, not property quality. This index has no commercial relationship with the properties listed unless a badge on the listing says otherwise.
Conditions change, and we will not always know. Every record is a snapshot of what a property had published when we read it, and that date is on the page. Conditions change: a property can refit, change suppliers or replace a system at any time, and nothing requires it to tell us. We re-read records and ask properties directly for updates, but there will always be a gap between what is true today and what was published when we looked. Use this as a frame of reference for what to ask, not as a substitute for asking. Take your own questions to the property before you book, and tell us if you find something we have wrong.
We report what properties publish. We do not inspect, certify or vouch for any property on this index unless a listing says we assessed it on site, and we accept no responsibility for decisions made or outcomes experienced on the basis of what you read here.
Questions travelers askwater, air, EMF, and whether it is worth it
Questions travelers ask about Post Ranch Inn
Does Post Ranch Inn publish water quality testing?
Yes, at specification level: a named system, supplier or standard is on the record, without a published measurement. Scored 2 of 3.
What is the air quality like in the rooms?
We can only report what is published about the rooms themselves. Yes, at specification level: a named system, supplier or standard is on the record, without a published measurement. Scored 2 of 3.
Is Post Ranch Inn low-EMF?
No measurement is published. Only 14 of the 70 properties we have researched publish any bedroom EMF information at all, so this is the industry norm, not an outlier.
Is Post Ranch Inn worth it?
We score evidence, not experience. On evidence, it ranks 17 of 70 researched records. The strongest documented pathways are Air Quality and Water Integrity; nothing is published on EMF Harmony or Sound and Sensory Ecology.