Cherry Point Industrial Fallout
What it is
West of Ferndale sits one of Washington's largest industrial areas — two operating oil refineries and the 1,600-acre former Intalco aluminium smelter, now mid-demolition. Homeowners downwind describe glass that never quite looks clean: a fine, even haze rather than visible dirt. This page sets out what is actually there, and what we can and cannot say about it.
Ask anyone who cleans exteriors on the west side of Ferndale and they will tell you the same thing: the glass out there behaves differently. It does not get dirtier in the way a house under a tree gets dirtier. It goes flat.
This page is an attempt to be straight about that — what is actually at Cherry Point, what we observe on the glass, and where the line sits between those two things.
What is actually there
Cherry Point is a heavy-industrial area on the Strait of Georgia shoreline, west of Ferndale and north of Lummi Bay. It is one of the largest concentrations of industry in Washington State, and it has three principal components.
BP Cherry Point Refinery — a major crude oil refinery, operating, with its own marine terminal.
Phillips 66 Ferndale Refinery — a second refinery a short distance away, also operating.
The former Alcoa Intalco Works — an aluminium smelter on roughly 1,600 acres, sandwiched between the two refineries. It ceased operating in 2020, laying off around 700 workers. Demolition began subsequently and was around 45% complete in early 2026, with buildings and silos scheduled to come down through 2026 and soil work into 2027. The site was bought by AltaGas, which has proposed a green hydrogen facility there, currently on hold.
That last point is worth sitting with, because it means the industrial mix at Cherry Point has changed materially within the last five years and is still changing. Anyone describing the area as a fixed, static source is describing it as it was, not as it is.
What we observe on the glass
Here is the part we can speak to directly, because it is what the crew sees.
On properties on the western side of Ferndale and out toward Custer and Birch Bay, glass acquires a film with three distinguishing characteristics.
It is even. Not splash, not spotting, not a run down from a sill — a uniform veil across the entire pane. That uniformity is why it is so easy to miss and so maddening once noticed.
It shows in raking light. In flat daylight the window looks fine. When low winter sun comes in at an angle, the whole pane reads slightly grey, as though looking through a stocking. This is the single most common way people first describe it to us.
It returns faster than it should. Householders in the band routinely say their windows “never look clean even after washing them.” That is not a comment on their cleaning — it is what a fine particulate film does when it is being resupplied.
Practically, this is why a schedule that works in Lynden does not work on the west side of Ferndale. Houses in the affected band tend to want three visits a year rather than two, and the clean lasts better if it is timed to the calmer, wetter months.
The same film lands on solar panels, where it matters more than it looks, and on siding, where it reads as a general dulling rather than as the green growth people expect.
What we will not claim
This is the part that separates an honest page from marketing copy, so it is stated plainly.
We have not measured anything. We do not sample air, we do not analyse deposits, and we do not own instrumentation. Nothing on this page is based on measurement we performed.
We cannot attribute the film to a specific source. A house west of Ferndale sits downwind of an industrial area, a working agricultural valley, a marine shoreline and a highway. Fine particulate arrives from all of those, and telling them apart requires laboratory analysis, not a squeegee. When we say “industrial fallout” we are using the local shorthand for a phenomenon people describe, not asserting a chain of causation we have established.
We will not tell you it is harmful, or that it is harmless. Air quality in this county is monitored by the Northwest Clean Air Agency and the Washington State Department of Ecology, both of which publish data and both of which are qualified to speak on it. We are not. If the health question is what is actually on your mind, they are the right call and we will say so rather than fill the silence.
What we will do is tell you what your glass looks like, what comes off, what does not, and how often it is likely to need doing.
How it is removed
There is no special chemistry. It is a surface film, not a bonded deposit, and that is good news.
On reachable glass, the ordinary method — solution, scrubber, squeegee — takes it off in a single pass, and physical contact is what does the work. On upper storeys, purified water through a pole rinses it and leaves nothing behind as it sheet dries.
The one thing to avoid is a quick hose-down. Wetting a fine even film and letting it dry redistributes it and, on hard water, adds mineral spotting on top. The half-measure is worse than leaving it.
Why the weather decides the day
Two patterns are worth knowing, because they explain why the same house looks different week to week.
Prevailing weather here moves off the water and inland. That is why the question of what sits upwind of a property is a real question in this part of the county rather than an abstract one, and why the effect is asymmetric — the industrial area is west of Ferndale, and the western side of town carries more of whatever is moving inland than the eastern side does.
Still, cold, clear weather concentrates whatever is in the air. Winter inversions in the lowlands trap air near the surface for days at a time: no wind to disperse, no rain to wash out. Those are also the days of lowest sun angle, so the accumulation and the lighting that reveals it arrive together. That coincidence is why so many people first notice this in January and conclude something changed.
Neither of these is a claim about emissions. They are ordinary facts about how air behaves in a coastal lowland with a mountain wall behind it, and they are the reason a fine film is a seasonal experience rather than a constant one.
On solar panels it costs more than it shows
Worth separating out, because the consequence is different.
A fine even film on a window is an appearance problem. The same film on a photovoltaic array is a production problem, and it compounds with the edge-band soiling that flush-mounted arrays in this region collect along the bottom frame anyway.
Arrays on the west side of Ferndale carry both at once: the general dulling across the glass, and the concentrated band where water pools at the frame lip and evaporates. The band is the expensive half, because cells wired in a string are constrained by the least productive one, but the general film is what makes the whole array quietly underperform its rating.
If output has drifted down over a couple of years with no fault reported and no new shade, this is one of the first things worth ruling out — and it is cheap to rule out, because a clean either changes the numbers or it does not.
At a glance
| What | Status |
|---|---|
| BP Cherry Point Refinery | Operating |
| Phillips 66 Ferndale Refinery | Operating |
| Former Alcoa Intalco aluminium smelter | Ceased operating 2020; demolition through 2026, soil work into 2027 |
| Site ownership now | AltaGas, green hydrogen proposal on hold |
| What we observe on glass | Even fine film, visible in raking light, returns faster than it should |
| What we have measured | Nothing — we do not sample air or analyse deposits |
| Who does measure it | Northwest Clean Air Agency and the Department of Ecology |
How to tell whether your property is in the affected band:
- Stand inside on a bright low-sun morning and look at a pane at a shallow angle
- Check whether the film is even across the whole pane rather than splashed
- Compare a sheltered window with an exposed one on the same elevation
- Notice whether it returns within weeks rather than months after a clean
- On an array, look for the general dulling as well as the bottom-frame band
Where the band actually is
We will not draw a map, because we have not measured one and a map implies precision we do not have.
What we can describe is the pattern we encounter: it is most pronounced on the western side of Ferndale and out toward Custer, present and lighter through central Ferndale, and appreciably reduced by the time you are east of the freeway or south toward Marietta. Birch Bay and the coastal strip carry it mixed with salt, which is a different problem layered on the same one.
If you are unsure whether your house is in it, the raking-light test settles it in about ten seconds: stand inside on a bright low-sun morning and look at a south-facing pane at a shallow angle. Either the glass is clear or it is not.
Related: window cleaning for method and scheduling, solar panel cleaning for what it does to output, and house washing for the same film on siding.
Questions about this surface
- Is there really something on my windows from Cherry Point?
- What we can tell you honestly is what we see: on the west side of Ferndale and out toward Custer, glass acquires an even, fine film faster than comparable glass further inland, and it reads as haze rather than dirt. What we cannot tell you is what is in it or where each particle came from. Nobody cleaning your windows has measured that, and anyone who tells you they have is guessing.
- How is it different from ordinary dirt?
- Ordinary dirt is uneven — splash, spots, runs, something you can point at. This is uniform across the whole pane, which is why it hides in daylight and appears the moment low winter sun comes in at an angle. People describe it as windows that never look clean even right after washing them, which is exactly how a fine, even particulate film behaves.
- Does it damage the glass?
- Not in the sense of etching it. What it does is dull it, and it combines with moisture overnight into a film that dries on rather than rinsing off — which is why a rain shower does not help and can make it worse. The concern is appearance and, on solar panels, output.
- Has it got better since the smelter closed?
- The Intalco smelter stopped operating in 2020, so whatever it contributed stopped then. We are not in a position to tell you what changed on your glass as a result — we have no before-and-after measurements, and the refineries did not close. What we will say is that the industrial mix at Cherry Point has changed materially within the last five years, and it is still changing.
- Does the demolition make it worse right now?
- Demolition of that scale produces dust; that is not a controversial statement about any demolition site. Whether it reaches a given property depends on the day, the wind and the work, and we have not measured it. If your glass has got noticeably worse in the last two years and you are downwind of the site, it is a reasonable thing to wonder about.
- What actually removes it?
- A normal clean, done properly. It is a surface film, not a bonded deposit, so it comes off with detergent and physical contact on reachable glass and with purified water on the pole. The issue is frequency rather than difficulty — houses in the affected band tend to want three visits a year rather than two.
- Should I be worried about my health?
- That is a genuine question and it is not one a window cleaner should answer. Air quality in Whatcom County is monitored by the Northwest Clean Air Agency and the Department of Ecology, and they publish data. We clean glass; we are not an air quality authority, and we will not pretend to be one.
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