Mold Testing for Schools and Districts

A district calls an independent tester for one of three reasons: a staff member or parent has raised a concern and it is now in writing, a roof or plumbing failure has affected occupied space, or a remediation proposal has arrived and the facilities director wants the scope validated before it goes to the board. All three come down to the same requirement, which is a third-party record produced by somebody who does not profit from the finding.

We test only. We do not remediate, we do not bid remediation, and we accept no referral fee from any contractor who does. For a public entity spending public money that is not a preference, it is the reason the document is usable at a board meeting.

Multi-building and district work is quoted, typically $0.10 to $0.20 per square foot plus per-sample, with volume rates for portfolio scope. Net 30 is available for established accounts, and we can complete a vendor packet and W-9 before the first purchase order.

Working inside a school calendar

Schools have three windows and each one supports a different scope.

Summer shutdown, mid June through mid August. This is when whole-building work is possible. Empty classrooms, mechanical systems available for inspection, ceiling access without disrupting instruction, and no need to coordinate around bell schedules. It is also the window where a discovered problem can actually be corrected before students return, which is the point. Districts that call us in April get scheduled for June. Districts that call in July are competing with every other summer project for the same eight weeks.

There is a technical wrinkle worth knowing. Buildings that sit closed with HVAC setback over a hot Inland Northwest summer accumulate settled particulate and can develop elevated humidity in spaces that are conditioned during the school year. If we sample a building that has been sealed for six weeks, the result reflects a sealed building. We will note operating conditions in the report and, where the question warrants it, sample both under setback and after normal operation resumes.

Winter and spring break. One to two weeks. Suitable for a wing, a building, or targeted follow-up. This is the usual window for verifying summer remediation held.

During the school year, after hours. Evenings, weekends, and non-instructional days. Air sampling equipment is a pump running five to ten minutes per location and it is quiet, but ceiling access, borescope work and mechanical inspection belong outside instructional hours. We work around athletics, custodial schedules and building security, and we badge in through whatever your district requires.

Classroom-by-classroom documentation

For a school the unit of documentation is the room, because that is how the question will be asked. A parent asks about their child's classroom. A teacher asks about theirs. A board member asks about a building. A report organized by wing or by air handler cannot answer any of those, and it will be read as evasive whether or not it is.

Every sampled space gets its own entry: room number, sample identifier, measured air volume, collection time, psychrometric readings, moisture readings on any suspect assembly, photographs keyed to that room, and the laboratory result for that sample compared against the outdoor control taken the same day.

That structure has a second benefit. When most rooms in a building are unremarkable and two are not, a room-level report shows that immediately. A building-level average hides it, and a hidden problem discovered later is far worse for a district than a documented one addressed on schedule.

Multi-building and district-wide scope

Districts rarely have one building. Scoping across a campus or a district means deciding, in advance and in writing, what gets sampled and why.

We build the plan around three inputs. First, the building's known water history: roof age and type, past leaks, plumbing failures, below-grade spaces, and any prior remediation. Second, the mechanical layout, because ducted systems distribute particulate along their branches, so complaints often cluster by air handler rather than by proximity to the source. Third, the complaints themselves, mapped to rooms.

Typical district plans include targeted sampling in complaint rooms and their adjacent spaces, representative sampling in comparable rooms with no complaint history to establish an internal baseline, mechanical room and AHU inspection, and an outdoor control at each building sampled. Buildings are separate properties for baseline purposes. An outdoor control from the high school does not calibrate a sample from an elementary two miles away.

Older stock in this region deserves specific attention. In the City of Spokane about 27% of housing was built before 1950, and school inventories track a similar age curve, with mid-century construction, flat or low-slope roofs with internal drains, single-pane or early replacement glazing that condenses in a Spokane January, and unit ventilators along exterior classroom walls. Those unit vents are a recurring find: a plugged condensate line or a wet insulation blanket inside the cabinet sits directly under a window in an occupied classroom.

What the assessment includes

• Air sampling with a calibrated pump drawing a measured volume through an Air-O-Cell or Allergenco-D spore trap cassette, analyzed by an accredited laboratory using direct microscopic examination
• An outdoor control at every building sampled. Outdoor air always contains mold spores. Elevated means elevated relative to outside, same property, same day. An indoor count with no baseline supports no conclusion, and a parent group or an attorney will identify that gap
• Surface sampling by swab or tape lift to confirm whether visible growth is fungal rather than staining or efflorescence
• Moisture mapping with pin and pinless meters on suspect assemblies
• Thermal imaging for temperature differentials behind intact finishes, above hard ceilings, and around window and roof penetrations
• Borescope inspection of wall cavities, chases and above-ceiling plenums
• Psychrometrics by room: temperature, relative humidity, dew point
• Mechanical inspection where systems are implicated: AHU interior, coil and drain pan condition, filter condition, visible duct liner, unit ventilator cabinets
• Written report organized by room, with photographs, raw laboratory data, chain of custody and stated method and limitations

Post-remediation verification is evaluated against IICRC S520, the industry standard for professional mold remediation, and is quoted by containment count.

Pricing

Quotes are fixed and written before mobilization, with sample count, buildings and rooms covered, schedule and price. We do not expand scope on site without written authorization, which matters when the funding is a purchase order against an approved amount.

Communicating results to parents and boards

This is usually the part districts are most worried about, and it is worth being direct.

Do not overstate and do not understate. Both fail. A report that hedges everything reads as concealment. A report that overclaims creates an obligation the district cannot meet and hands a plaintiff a document.

Use accurate health language. CDC has never established a causal link between Stachybotrys and serious illness, and says no test proves an association between a specific mold and particular health symptoms. What is documented is allergic reaction, asthma triggering and upper respiratory irritation in sensitive people, plus serious infection risk in the severely immunocompromised. In a school population, asthma is the relevant and legitimate concern and it is enough of a reason to act. It does not require exaggeration.

Say what the result establishes and what it does not. There is no numeric legal limit for airborne mold in Washington, Idaho, or federal law. Nothing passes or fails a statutory threshold. We do not claim a building is safe in a general sense and we do not make regulatory or compliance determinations. What the report establishes is condition, comparison to outdoor baseline, moisture state, and the extent of affected material on the date tested.

Give people the document. Room-level data that a parent can read for their child's classroom does more to end a controversy than any statement from a podium. We write reports on the assumption that they will be published, because in a district they usually are.

We are happy to attend a board meeting or a staff session to explain method and findings factually. We will not offer opinions about fault, personnel, or what the district should have done.

Questions districts ask

Can you complete this over one summer? Depends on building count and square footage. Tell us the inventory and target date and we will tell you honestly what fits. Multi-building programs are usually easier to complete if the plan is set in spring.

Will you tell us the building is safe? No, and neither should anyone else. We report conditions on the date tested against an outdoor baseline, with moisture readings and lab data. A safety determination is a judgment the district makes with that information.

Do you write the remediation scope? No. We document extent. Keeping those separate is what makes our documentation useful when you compare contractor proposals.

Can you validate a remediation proposal we already received? Yes, and it is one of the most valuable things we do for a district. Independent moisture mapping establishes the boundary of affected material so the proposed scope can be measured against something.

Are you insurable and can you meet our vendor requirements? Yes. Send the district's vendor packet, insurance certificate language and any background check requirement and we will complete it in advance.

How fast are results? Laboratory results normally in 1 to 3 business days, written report within one day of that. Rush 24 hour lab is $100 per job when a board date is driving the schedule.

Get a district quote

Send building inventory, square footages, the rooms or areas in question, and your target window. We will return a written sampling plan and a fixed price you can take to a purchase order.