When buying property, how close is too close to industrial ag?

Hi all! My first post here, so hopefully I'm not doing this in the wrong place. My husband and I are looking to buy a farm but we noticed that it's less than a kilometer from a large industrial ag farm that is obviously spraying all kinds of stuff. Is that too close for us to be able to have a healthy insect and soil life population? What are some considerations when living close to that kind of ag? Is there anything defensive we could do if we did buy the land? Thank you in advance for your wonderful insight!

Issues may be;
- Spray drift, find where the prevailing winds flow from, its best to be upsream of any wind
- Groundwater contamination
- Rainwater contamination
- Noise travels far at certain pitches
- water course flow, you need to be upstream to ensure you dont get contaminated water

One of my first concerns would be groundwater contamination. High nitrate and possible chemical contamination of aquifers is often associated with industrial agriculture settings. Also if they have been using bio solids from waste water treatment plants PFAS ( polyfluoroalkyl substances) contamination is also a possibility. I don't want to scare you off , however as they say: to be forewarned, is to be forearmed.

Slightly wrong question. It's not just "industrial ag." that's problematic. It's all forms of chemical farming, large and small. A small plot of gmo soybeans can hurt your crop, or your bees. Hybrid plants of all kinds can fairly easily cross with heritage plants. ~From the look of the picture you posted you have agri. activity right next to the land you are considering. If you want to be truly organic/permaculture/biodynamic I would keep a long distance from any hybrid operation. Unfortunately, that can even include a next-door neighbor that sprays Chem-Lawn on their grass.

If nobody buys land next to industrial ag, how can change take place?

"If nobody buys land next to industrial ag, how can change take place?"

Putting a good apple into a barrel of rotten apples does not turn the rotten apples good. Buying land next to polluted land does nothing to cure the pollution. Change comes from education and teaching a better way. If you want to purchase land next to unhealthy land and still want to grow a healthy crop, you are going to be faced with possibly insurmountable problems. If you want to buy land next to polluted land so you can post signs decrying the pollution, or do some other form of protest or education, then maybe that's a purchase that makes sense. ~~So what do you want? A peaceful life and harvest, where you have the possibility to invite folks to enjoy your harvest. Or a long time, maybe a lifetime, of fighting the beast? As for me, I'll fight a corporate owner, maybe a continent away, as I am able. But for my daily life, and the life of my family and friends and customers, I choose peace.

It's important to define where you are, what they are growing, and what they are trying to control with chemicals.

I spent two decades operating cheek by jowl with "big ag herbicide." Buffered by trees, though never enough. We had some frictions ("who is this piss-ant").

But at the end of the day, when I compared my deep soil with their hydroponics, and my massive population of pollinators and migratory birds with their industrial deserts, my place kicked serious ass. In a language they could not comprehend.

This was literally across the fence. A kilometer of separation would be a dream. My 2c.

You might check prevailing winds.  Our state has wind drift laws/fines for damage  to non-target crops.  Violations are posted in the monthly Ag paper.  Reporting your neighbor, if needed, might be a bit confrontational, but is one avenue.  

Our property borders a conventional field.  I know the fellow that farms it pretty well and we are on good terms.  He was about to spray on a windy day, and I asked him not to.  He graciously complied, saying he hadn’t really noticed how windy it was and I think he considers it now.  Prior to this, I never really noticed any drift damage. The fine mist is a bit concerning and I was close enough to smell (thus exposed) it once.  But, the vegetation kill line is very distinct and does not show enough drift to kill grass outside of the intended area.  

A dense hedge of hardy trees could help catch drifting chemicals.

We have no empirical evidence, but do believe we have more bugs and birds than we used to have (our land was conventionally farmed before we bought it).  We attribute this to an increase in plant diversity and habitat.

Unless you are able to purchase a massive amount of land (individually or collectively) and farm in the middle of it, it is going to be difficult to completely isolate yourself from conventional ag chemicals.  People move, die, etc and land changes hands.  Almost any adjoining land, especially in predominantly ag areas, could be turned into chemical farming at some time in the future.

Thanks all for these thoughtful responses. As far as I know, the prevailing winds are coming from the north, so that should help. We would also be a bit upstream from them as our land would come with a hill at the top of it at the furthest point from the other farm.

To answer the question about what we would be doing: we are hoping to develop a syntropic system as a teaching site for a Mediterranean climate, focusing most of our attention on rebuilding the water cycle and biodiversity in flora and fauna. We would live off of tourism/campsite income and eventually teaching/workshops once the system becomes proof of concept. There are a few other examples of this kind of setup in Spain and Portugal, but not so much in Sardinia where we are looking.

Our plan is full of principles and ideals (aka naive as hell, we know), which is why the presence of the big spray zone was an immediate concern. I see both sides of the argument: go for the good fight vs don't make an already difficult career/life choice more difficult. It's weird that I didn't notice it at all when I was there, but maybe I wasn't looking well enough. I only found out through satellite images.

Be sure to check zoning/council restrictions!  Several higher profile farming operations have run into problems when they started trying to bring in people for labor or agrotourism.