Sometime between 4 and 6 this morning, while everyone in Port Monmouth and Belford was still asleep, a county pickup truck drove our streets with a machine in the bed pushing a very fine mist of a pesticide called Duet into the air, because mosquitoes caught in a trap nearby had tested positive for West Nile virus. I found out about it because a co-worker who lives a few streets over walked up to my desk and said she wanted to show me something since we live so close to each other. It was an Instagram post from @monmouthgovnj, put up the day before, with a satellite image of my neighborhood and an orange square drawn around it. Somebody had sent it to her, she was now sending it to me, and she signed off with “stay safe out there.” When it reached me it had 11 likes. By the next day it was up to 41, plus one confused-face emoji, and as far as I can tell that was the entire public conversation about a pesticide being sprayed over a few thousand people while they slept.

I should say up front that neither of us was upset about the spraying. The conversation that followed was mostly the two of us comparing bites, because there are an obscene number of mosquitoes in Port Monmouth this summer, the kind where you step outside to grab the mail and come back with a new constellation on your ankle. Every time either of us goes outside we are eaten alive, and West Nile is not an abstraction when the thing carrying it is already on you. So the county sending a truck is, in the most literal sense, the government coming to help. What I could not stop thinking about was how the news of it got to me.

What was in the truck

Duet Dual-Action is a mix of two synthetic pyrethroids, prallethrin and sumithrin, plus a third ingredient called piperonyl butoxide whose only job is to make the first two work harder. It goes out through an ultra-low-volume sprayer that the county says releases a fraction of an ounce per acre, and the EPA’s current position is that pyrethroid products are slightly toxic with minimal risk to people when used properly. I am not going to argue with any of that. West Nile peaks in August and September, the mosquitoes that carry it are the ones biting us on the porch, and the county’s job is to knock them down before somebody’s grandmother ends up in Riverview with a fever nobody can explain.

What I did not know until I read the county’s own fact sheet is how the stuff actually works. The two chemicals together produce what the manufacturer calls “benign agitation,” which is a very polite way of saying that the spray wakes the mosquitoes up. They leave wherever they were resting, start flying around, and fly straight into the mist. So somebody engineered a product whose whole trick is getting mosquitoes out of bed at 4 a.m. so it can kill them, and then a man in a pickup truck drove it past my bedroom window while I was doing the exact opposite.

That same fact sheet comes with a list of things you are supposed to do while the spraying happens: bring pets inside along with their food and water bowls, bring in clothing and children’s toys, close the windows, switch the window air conditioner to non-vent, and keep kids off sprayed surfaces for about an hour until everything dries. All of it is reasonable advice that assumes you knew it was coming.

The square

The map is strangely precise about where the mist was and was not going to go. The treatment area runs east of Wilson Avenue, north of the Henry Hudson Trail, and west of Ware Creek, and on the satellite image the orange line follows Church Street and Broadway and then just stops, as though the mosquitoes had agreed to respect it. Somebody sat at a computer and drew that shape, presumably as a radius around the trap that caught the positive sample, though the notice does not say and nobody in the comments asked.

I found it oddly touching. It is the most attention my street has ever received from Monmouth County, and it arrived as the outline of an area I was not supposed to be standing in.

How you were supposed to know

The official version goes like this. Back in the spring, the Office of Mosquito Control published a legal notice covering the entire season, June 1 through November 30, stating that the county “may be applying pesticides” anywhere in Monmouth County “as needed” during that window and listing the five products it might reach for. That notice is the legal permission for everything that follows, and anything the county tells you after it is a courtesy.

The same notice promises that a resident who asks can get at least 12 hours of warning before an application, and then immediately carves out an exception for disease vector control, when conditions require spraying sooner. West Nile is disease vector control, which means the one situation where you would most want a heads-up is the one where the county is allowed to skip it.

To be fair, they did not skip it. The schedule went up on the county website the day before, a press release went out, it was posted to Instagram and Facebook, Middletown reposted it on the township news page, and both Patch and the Monmouth Journal ran it. If you follow any one of those, you knew. I follow none of them, and the only reason I did not sleep through it is that the post happened to pass through two other people on its way to my desk. When I went to the county’s mosquito page this morning to double-check the details, the schedule already read, “There are no adult mosquito control operations planned at this time.” The notice had existed for roughly a day and then been cleared away, with nothing left in its place to suggest anything had happened at all.

This is not the first time

It is not even the first time this month, since the county sprayed other sections of Middletown a week ago. Before that there was Leonardo in July 2024, Harmony that September, the neighborhoods near Earle last August, and the streets around Tindall Park last September. Every time it is a different orange square on the same township, the same 4 a.m. window, and the same “weather permitting” sitting in parentheses at the bottom of the map.

Which brings me to the thing the map cannot tell me: whether it actually happened. The operation was weather permitting, any postponement was supposed to be posted on the website, and the website now says nothing is scheduled. So either the truck came through and the record of it was wiped, or the truck did not come and the record of the cancellation was wiped, and from what the county has published there is no way to know which.

The part I keep thinking about

There is a county office with a superintendent and a fleet of trucks and a network of traps, a lab that tests mosquitoes for a virus, and a mapping system that can draw a line down the middle of Church Street. Every one of those parts worked this week. The system found the virus, picked the chemical, drew the shape, and drove the route, and the only piece that did not scale was the part where it tells you, which still depends on whether the right person happens to forward you the right post before bed.

I do not have a fix for that and I am not asking you to attend anything. I wanted the truck to come. I just think it is worth noticing that the most sophisticated thing the county did this week was aimed at my neighborhood, and the least sophisticated thing was telling my neighborhood about it, and that the gap got closed by a co-worker saying stay safe out there. The next time you see a satellite map with an orange line on it, look closely, because it might be your house inside the box.