Your well · Mattituck
If your Mattituck house is on a well, test the water
North Fork streets in Mattituck often have no water-district pipe at all. A mail-in lab kit is how you measure PFAS and 1,4-dioxane at the kitchen you actually drink.
Updated 2026-09-15 · Pipedeck
| County $100 test | Mail-in lab kit | |
|---|---|---|
| Names PFOA / PFOS at this tap | No | Yes |
| Names 1,4-dioxane | No | Yes |
| Who you deal with | Suffolk County (631-852-5810) | A certified lab you mail |
| Right next step when | You want the cheap county panel | This Mattituck kitchen drinks a well |
Cap, pump, or a water-district bill
Mattituck is a Southold hamlet on Long Island's North Fork. A lot of those lots never joined a public water main. If a water-district bill never shows up, the glass on the counter is the well. There is no plant between the sand under this hamlet and the coffee pot. In this hamlet, 20 of 38 private wells were over New York's PFAS limit. Some of those wells tested about sixty times over. That is a kitchen fact for Mattituck. It is not a score for your street. The well on this lot is the only well this kit can name.
Start outside. Look for a round well cap in the lawn, often close to the house. Then look in the basement or a small well house for a pump and a pressure tank. Then look at the mail. A regular Suffolk County Water Authority bill usually means this kitchen is on public water. No water-district bill, plus a pump, usually means a well. Do not guess from the next driveway. One lot can be on a main. The next lot can still drink a well.
If you just bought, ask for the last water bill and walk the yard with the inspector. If you grew up here, the pump you used to hear at night is the tell. If you rent, ask who pays the water and whether there is a cap in the grass. A landlord who cannot produce a district bill is describing a well house until proven otherwise.
Some lots keep a well for the lawn after the kitchen connects. If you still drink that well — coffee, cooking, the kids' glasses — this kit is the job. If the kitchen is already on public water and the well only feeds sprinklers, skip this kit. Use the tap-water guide for what you actually drink. The county-wide well guide lives on the Suffolk wells page. This page is the Mattituck kitchen.
What 20 of 38 does not tell you
Twenty of thirty-eight is a hamlet sample, not a census of every kitchen. Eighteen of those wells were not over the limit. Eighteen is not a lifetime clean bill for every lot in Mattituck. A later test can move. This page does not name your street.
Clear water is not a test. Taste is not a test. A neighbor who never had a problem is not a test. Forever chemicals do not announce themselves in the glass. Wells here tested over the PFAS limit. That does not name your tap. A mail-in lab kit does.
New York's drinking-water limit for two common forever chemicals, PFOA and PFOS, is 10 parts per trillion. That is a very small number. A twelve-dollar strip from the hardware store is not built for that job. It will not name PFAS. It will not name 1,4-dioxane. The same lab bottles that look for PFAS can also name 1,4-dioxane. Treatment after that number belongs on the filter pages. The measurement belongs here.
Some results here were sixty times that limit. Sixty times is how high those wells tested. It is not a street name. It is not a reason to skip the kit, and it is not a reason to buy a pitcher because the hamlet was in a headline. If this address is actually on public water, it is not a well house. Start with the tap pages instead of a well kit.
July weeks and the outdoor shower
Some Mattituck kitchens sit empty Monday through Thursday. That does not put a plant on the pipe. If anyone drinks the well when the house is open — a week in July, coffee on a Saturday, a month after Labor Day — treat it as a drinking well.
A house that sits dark on weekdays is still drawing the same sand. A hose left in the grass does not treat it. An outdoor shower on the side of the house is not the kitchen tap. When the kit arrives, fill the bottles at the cold kitchen faucet you actually use, on a day you are there. A North Fork weekend house can sit warm with the air conditioning off. Do not leave a full bottle on a hot porch.
Bottled water on the counter does not name the kettle. If the pasta pot, the ice, or the kids' glasses still come from the well, you are still drinking the well. Order the kit for that tap. If the kitchen is already on public water and nobody drinks the well, skip this kit and use the tap pages instead.
Two tests, two offices, two buttons
Two products get searched as if they were one. They are not.
Suffolk still sells a $100 private-well test. The number is 631-852-5810. Call the county if you want that panel. This site is not that office. The county test is cheaper. It looks at different things. It does not look for PFAS. It does not look for 1,4-dioxane. It does not look for PFOA or PFOS at 10 parts per trillion.
The mail-in lab kit is the test that can name PFAS and 1,4-dioxane at drinking-water levels. That is why the first button on this page is a well kit, not a pitcher and not a county appointment. Do not call Pipedeck to book the county test. Do not call the county to buy the button on this page. Keep the phone number with the county. Keep the kit with the lab.
This page has two kit buttons. The first is that mail-in lab class for a Mattituck well. The second is a tagged aisle for a well lab kit this week. Use the second if you want to shop that class on a tagged storefront. Read the listing. You still need a mail-to-lab panel that names PFAS and 1,4-dioxane. If the carton is a dip stick, a color chart, or a strip you hold under the faucet, put it back. The second button does not replace the first.
A nitrate strip and a hardness kit are other jobs. They can be worth doing later. They do not close this gap. A water softener is also not a PFAS filter. Softening changes hardness. It does not replace a lab kit, and it does not replace the filter you may buy after a result. If a recent report in the drawer already names PFAS or 1,4-dioxane, you may not need a second kit to postpone a filter you already know you need. If the report is old, or it never looked for those chemicals, start with the kit.
Bottles from the kitchen you drink
Order the kit. When the bottles arrive, read the card. Use the cold kitchen tap, the water you actually drink. Do not sample from a garden hose. Do not sample the outdoor shower. Do not run the hot side. Let the cold run the way the instructions say, fill the bottles, cap them, and pack them as the kit shows.
Mail them back the same day if you can. Do not skip a bottle because the water looks fine. The lab is looking for things you cannot see. If a bottle has a preservative, do not rinse it out. If the card says to fill to a line, fill to that line. If you miss the pickup window, do not guess. Read the card again or start over with a fresh kit. A bad sample wastes a week and still does not name the tap.
Before you close on a Mattituck house
Ask for the last water bill and walk the yard with the inspector. A round cap in the grass plus no water-district bill usually means the kitchen is a well. A seller who never had a problem is not a lab report. A county $100 result in the closing packet is not a PFAS result unless that paper names PFAS or 1,4-dioxane.
Do not wait for a neighbor's story to settle the tap. Do not hang a headline about this hamlet on the offer. Twenty of 38 is why a kit is a normal kitchen job here. It is not a price on this lot. Order a mail-in lab kit for the kitchen you will drink from, then buy a filter only if the report calls for one.
Shop the report, not the headline
Read the report at the kitchen table. Match the chemical to the next tool. Do not buy a mystery pitcher because the town name was in a headline.
If PFAS comes back high, look for NSF 53 or P473 on the box, or a reverse-osmosis system under the sink. A fridge pitcher that only says it filters water is usually the wrong tool. The longer filter guide is on the tap-water page. Test first, then buy.
If 1,4-dioxane is high, skip the pitcher. Reverse osmosis is the class that addresses it. A pitcher will not. That is a different chemical from PFOA and PFOS, and it does not come out the same way. The 1,4-dioxane reverse osmosis guide is that job.
Calverton's old plant numbers belong on the Calverton page. They are not a reading for a Mattituck kitchen. Hempstead public wells are a public-supply story, not this North Fork lot. The kit does not replace the filter. The filter does not replace the kit. If you still drink the well, measure first, then buy. If a unit is already under the sink, next year is cartridges.
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Common questions
Do I need to test a Mattituck well?
If the house is on a private well, yes. Public water is a different job. In Mattituck, 20 of 38 wells were over the PFAS limit. That does not name your tap. A mail-in lab kit does.
Is my Mattituck house on a well or on town water?
Walk the yard for a round cap. Look for a pump or pressure tank. Then look at the mail. No water-district bill plus a pump usually means a well. A regular Suffolk County Water Authority bill usually means the kitchen is on public water. Do not guess from the next driveway.
Does Mattituck have public water?
Some later streets pay a water-district bill. Many North Fork lots never joined a main. Twenty of 38 is a private-well sample, not a census of every kitchen. A regular Suffolk County Water Authority bill usually means this tap is public water. No bill plus a cap or a pump usually means a well. Do not guess from the next driveway.
Is this the Town of Southold well page?
No. Southold is the town. Mattituck is this hamlet. The 20 of 38 PFAS sample stays on this URL. Cutchogue and Greenport keep their own kitchens. If you drink a Mattituck well, this kit is the job.
If I rent in Mattituck, how do I tell well versus town water?
Ask who pays the water and whether there is a cap in the grass. If the landlord cannot produce a water-district bill, treat the house as a well house. Fill bottles at the kitchen you drink from.
Does a Suffolk County Water Authority bill mean I should skip this kit?
If the kitchen tap is on that bill, this well kit is the wrong next step. Use the tap-water guide for what you actually drink. If the bill is for a different meter, or there is still a drinking well, test the well.
What does 20 of 38 Mattituck wells over the PFAS limit mean for this tap?
It is a hamlet sample, not a reading for this lot. Eighteen of those wells were not over the limit. Eighteen is not a lifetime clean bill. A mail-in lab kit is what names this kitchen.
Eighteen of those wells were under the limit. Can I skip the kit?
No. Eighteen is not a lifetime clean bill for every kitchen in Mattituck. A later test can move. This page does not name your street. If you drink the well, measure it.
What does sixty times over mean for this kitchen?
Some sampled Mattituck wells tested sixty times New York's PFAS limit of 10. That is how high those wells tested. It is not a street name. It is not a reason to skip the kit, and it is not a reason to buy a pitcher before you have a number.
Does a neighbor's Mattituck well result count as mine?
No. Your well is its own well. Twenty of 38 is a hamlet fact, not a score for this street. Test the water you actually drink.
Can clear, good-tasting well water in Mattituck still need a lab kit?
Yes. Clear water is not a PFAS test. Taste is not a PFAS test. Forever chemicals do not announce themselves in the glass. Mail the bottles.
Does a Mattituck well kit look for PFOA and PFOS at 10 parts per trillion?
The mail-in lab class on this page is the test that can name those two forever chemicals at New York's drinking-water limit of 10. A twelve-dollar strip will not. Suffolk's $100 county panel will not. Taste will not. Twenty of 38 is why that pair is a kitchen job here. It is not a reading for this street until bottles come back.
Do the same Mattituck bottles look for 1,4-dioxane?
Yes. The same mail-in lab class can name 1,4-dioxane at this North Fork tap. That chemical is not PFOA or PFOS. After the report, reverse osmosis is the class that addresses it — a pitcher will not. The measurement belongs here. The treatment guide is the 1,4-dioxane page.
Is this mail-in kit the same as Suffolk County's well office?
No. The county number is 631-852-5810. That office sells a $100 test that does not look for PFAS or 1,4-dioxane. Pipedeck is not that office. The first button on this page is a lab kit you mail.
What is the difference between the two kit buttons on this Mattituck page?
The first button is the mail-in lab class for this Mattituck tap: bottles from the cold kitchen that can name PFAS and 1,4-dioxane. The second is a tagged aisle for a well lab kit this week. On that aisle, still pick a mail-to-lab panel, not a hardware-store strip. The second button does not replace the first.
Can I use a hardware-store strip on this Mattituck well?
No. A strip will not name PFAS or 1,4-dioxane at this North Fork tap. Order a mail-in lab kit, fill the bottles at the kitchen you actually drink, and send them back. Twenty of 38 is not a color chart.
Should I test a weekend house in Mattituck?
If anyone drinks the well — even a few weeks a year — treat it as a drinking well. Empty weekdays do not treat the sand. Fill the bottles at the cold kitchen tap you actually use when you are there, not from a hose.
If this Mattituck kitchen is on public water and the lawn still has a well, do I order this kit?
Only if you drink that well. If the well only feeds sprinklers, this kit is the wrong next step. Use the tap-water guide for what you actually drink.
If this Mattituck kitchen only uses the well for coffee and cooking, do we still test?
Yes. Coffee, cooking, and the kids' glasses are drinking the well. Bottled water on the counter does not name the kettle. If the kitchen tap still feeds food, fill the bottles there.
Can I fill the bottles for a Mattituck well at the outdoor shower?
No. Use the cold kitchen tap. An outdoor shower and a garden hose are the wrong sample. Do not run the hot side.
Should I test the well before I close on a Mattituck house?
Ask for the last water bill and walk the yard. If there is a cap and no water-district bill, treat it as a well house. A seller's old county test is not a PFAS result unless the report names those chemicals. Order a mail-in lab kit for the kitchen you will drink from.
Is a Mattituck well the same job as a Calverton well?
No. Calverton is a different hamlet with a different well problem. Do not hang a Calverton site number on a Mattituck kitchen. Hempstead public wells are a different story too. This page is a North Fork house on a well.
Are Hempstead public wells the same job as a Mattituck well?
No. Hempstead drinking water is a public-supply story. This page is a North Fork house on a private well. Do not copy a Nassau plant number onto this kitchen.
Should I buy a filter because Mattituck wells tested high?
No. Twenty of 38 is not a shopping list. Test first, then buy. If PFAS comes back high, look for NSF 53 or P473, or reverse osmosis. If 1,4-dioxane is high, reverse osmosis, not a pitcher.
Suffolk County well sampling; Suffolk County $100 private-well test (631-852-5810); New York drinking-water limits for PFOA, PFOS, and 1,4-dioxane.