Living Near a Factory in Western Mass: What the Pollution Record Shows

The house is good, the price is good, and there is a mill building four streets away with a stack on it. Somebody at work tells you they would not live near that. Somebody else says it has been closed for years. Neither of them has looked anything up, and there is a federal record going back to 1987 that answers the measurable part of the question.

Across the towns of Western Massachusetts that have ever had a reporting facility, total reported chemical releases fell from 8,424,958 lb in 1987 to 1,387,879 lb in 2024. That is a decline of about 84%.

Why The Line Falls, Which Is Three Different Stories

A falling number here has three possible causes and the record does not label which applies.

1. A plant genuinely cut its releases. Process changes, capture equipment, substituting one input for another. This is real and a great deal of it happened after the reporting requirement came in, which was rather the point of requiring it.
2. A plant closed. Releases go to zero and nothing got cleaner. Reporting facilities across these towns fell by 60 over the period, so this is doing substantial work in the line above. This region lost industry over exactly these decades, which is the same story as what happened to the mill cities.
3. A plant fell below the reporting threshold. Reduce output or change what you handle and you stop appearing, without closing and without changing much.

Only the first is unambiguously good news, and the honest reading of this region's chart is that all three happened at once.

What This Record Does Not Measure

Be careful with this data, because it is easy to over-read and it gets over-read constantly.

It counts pounds. It does not weight them by toxicity, so a pound of one substance and a pound of another sit in the same column as if they were the same thing, and they are not. It records what left the facility, not where it went, at what concentration, or whether it reached anybody. And it is self-reported by the facility under a federal requirement.

So a high number in a town is a signal to look further, not a finding about the air on a particular street. It cannot tell you whether living near a specific plant is harmful, and this page will not pretend otherwise. What it does tell you reliably is scale and direction over time, which is genuinely useful and is not available anywhere else.

The Legacy Matters More Than The Current Number

Here is the part that actually bears on a house purchase, and it is not the pounds column.

Releases from a working plant are regulated, monitored and, on this evidence, much reduced. What sits under the ground from decades when none of that was true is a different question and it does not appear in this record at all. A facility that closed in 1985 reports nothing today and may have left a great deal behind.

That legacy shows up in a different registry, and it is the one to check before buying near an industrial site: the state's cleanup files and, more importantly, the deed restrictions that follow a closed cleanup. What a 21E site actually means covers both, and the finding there is worth repeating: across this region there are more parcels carrying a permanent land-use restriction than there are open cleanup files.

Every Reporting Town

Sortable and filterable. 38 of the towns in this record still have at least one reporting facility. Springfield has the largest reported volume in the latest year.

What To Actually Check Before Buying Near A Plant

1. Find out whether it is operating. A stack is not evidence of activity in this region, where a great many mill buildings have been converted or stand empty.
2. Check the cleanup registry for the site and the ground around it, and check whether any parcel nearby carries a recorded land-use restriction. Both are public.
3. If you are on a private well, test the water. This is the mechanism by which an industrial legacy actually reaches a household in this region, and it is the one thing on this list that produces a number about your own property rather than about a facility.
4. Ask the neighbours. Noise, odour, lorry movements at four in the morning. None of that is in any federal dataset and all of it will affect your life more than the pounds column.

For a specific property rather than a town total, look the address up: the registry entries recorded for that town are listed with their state file numbers, each linking to the Commonwealth's own file.