Your well · Calverton
How to test a private well near Calverton
Calverton streets mix private wells and public water, often on the same block. If this kitchen still drinks a well, mail a lab kit that looks for PFAS and 1,4-dioxane — a fridge pitcher will not treat dioxane.
Updated 2026-09-15 · Pipedeck
| County $100 test | Mail-in lab kit | |
|---|---|---|
| Looks for PFAS / 1,4-dioxane | No | Yes |
| Who runs it | Suffolk County (631-852-5810) | A certified lab you mail |
| Best if | Everyday basics | This kitchen still drinks a well |
Calverton is a Riverhead-town hamlet on the East End, next to the old Navy-Grumman plant. The ranches look the same from the curb. The pipe feeding the kettle does not. Some kitchens still pull from a private well. Some already pay a water district. A few lots keep a well for the lawn after the kitchen connected. The useful first question is not whether the hamlet is “contaminated.” It is whether this house swallows well water.
If the answer is yes, nobody is treating that water on the way in. A mail-in lab kit is the first useful buy. A $12 strip from a hardware aisle will not name PFAS or 1,4-dioxane. Suffolk's $100 private-well test will not either. If the kitchen already drinks a district, skip the well kit and shop a filter class that matches the chemical you care about.
How do you know this Calverton house drinks a well?
Look at last month's mail. A water-district bill means the kitchen is on a treated main. No water-district bill, plus a round cap in the grass, usually means a private well. A pump and a pressure tank in the basement or a well pit point the same way. If you rent, ask who pays the water. If you just closed, walk the side yard before you assume the tap is treated.
Calverton streets mix. That is the hamlet fact, not a rumor borrowed from another town. One ranch can sit on a main while the next ranch still draws from the yard. The neighbor's setup is not your pipe. Do not skip a kit because the house across the street got a main. Do not mail bottles for a kitchen that already drinks public water.
If the bill is unclear, call the district that serves the street and ask whether this address is on their system. If they say no, treat it as a well. Some lots keep a well for sprinklers after the kitchen connected. If coffee, cooking water, and the glasses on the table still come from that well, test that well. If the kitchen already drinks a district and the well only feeds the lawn, skip the well kit. Filter what you actually swallow. The county-wide kit page is testing a private well in Suffolk. This URL is the Calverton fork: know the pipe, then measure it if it is still a well.
Why Suffolk's $100 test is a different product
Suffolk still sells a $100 private-well test. The phone is 631-852-5810. Call that office if you want their panel. This site is not that office. Their test is cheaper. It looks at bacteria, nitrate, and the metals people have asked the county about for years. It does not look for PFAS. It does not look for 1,4-dioxane.
The kit on this page is a mail-in lab kit. You fill bottles at the cold kitchen tap you actually drink from. You pack them. You send them. The report comes back as lines, not as a tint on plastic. Do not sample a garden hose. Do not sample the hot side. Do not rinse a bottle that already has a preservative. Follow the hold times on the label. This publisher does not read the result.
Two products get searched as one well test. They are not the same. Keep the county phone with the county. Keep the kit with the lab. Buy the county panel too if you want the everyday basics. Buy the lab kit when this house still drinks a well. They are not substitutes.
Two kit buttons, same lab class
This Calverton page has two kit buttons. They are the same job: bottles that can name PFAS and 1,4-dioxane at the kitchen you drink. The first button is that mail-in lab class. The second is a tagged aisle for a well lab kit this week. Neither button is the county's $100 panel. Neither is a fridge pitcher. The first hop stays the first hop — this page does not swap it.
On the second aisle, still pick a mail-to-lab panel. If the listing is a dip stick, a color chart, or a strip you hold under the faucet, put it back. Price is not a method. A well-cap thumbnail is not a lab. Fill at the cold kitchen handle. Pack the same day if you can. One kit covers this house.
What the old plant numbers are — and are not
The old Navy-Grumman plant sits nearby. Site tests there measured 1,4-dioxane at 14.9 ppb against New York's 1 ppb drinking-water limit, and one PFAS compound — PFNA — at 7,580 ppt against a 10 ppt limit. Those figures belong to the site. They are not a score for this kitchen. They are why a well on this map is worth a real lab kit instead of a supermarket jug.
This is not the Bethpage plant. Bethpage is Nassau, mostly public water, and a different solvent story. Calverton is a Riverhead-town hamlet. Do not copy a Bethpage water bill onto a Calverton well. Do not hang this well kit on a Bethpage tap just because both names say Grumman.
Cleanup at the site is not a kitchen result either. Language about a plume toward the Peconic, and a remediation study talked about toward 2039, does not name the glass you poured this morning. You do not have to track the cleanup to fill bottles. You do have to fill bottles if this house drinks the well.
Long Island drinks from one sand aquifer, named a sole-source supply in 1978. There is not a second drinking-water supply under the island. A private well in Calverton is that sand at your house. Public water is that sand after a district treats it. The well just means the treatment step is yours — after you measure. Clear water is not a test. Taste is not a test. A neighbor who already bought reverse osmosis is not a test. The sand story lives on the aquifer page. This page stays on this address.
If 1,4-dioxane is the chemical, skip the pitcher
1,4-dioxane does not come out in a fridge pitcher. Carbon in a jug is the wrong tool for this molecule. Reverse osmosis is the usual class — an under-sink unit with a small drinking faucet, not a pitcher on the top shelf. If the well test is still out, you can wait for the report before you buy a whole-house system. Most households start at the drinking tap and leave the shower and the washing machine on the well as-is until they decide otherwise.
If a recent lab report already names 1,4-dioxane, you may not need a second kit to postpone a system you already know you need. If the paper is old, or it never looked for that chemical, start with the kit. The longer treatment page is the island-wide 1,4-dioxane reverse-osmosis guide. This URL stays the Calverton well path: measure first, then reverse osmosis if that chemical is the one.
If PFAS is the chemical, read the box
PFAS are the forever chemicals New York now limits in drinking water. The state's line for two common ones — PFOA and PFOS — is 10 parts per trillion. The 7,580 ppt figure on this page is PFNA at the plant, a different named compound in the same family. Keep the labels. Do not splice the site number onto every Calverton faucet.
Look for NSF 53 or P473 on the carton, or buy reverse osmosis. A pitcher that only says “filters water” is usually not that mark. PFAS and 1,4-dioxane are different chemicals. A filter can cover one and miss the other. Reverse osmosis is the overlap if you want one unit at this sink. NSF 53 or P473 without reverse osmosis is a PFAS path, not a 1,4-dioxane path. Match the box to the chemical on the report. The longer label guide is the PFAS filter page.
If this house already pays a district, skip the well kit. Start with the PFAS tap page and the 1,4-dioxane tap page. The well-test buttons on this page are only for a well that is still a well.
After the bottles come back
If the report is low enough for you, you can stop. If a chemical is high, match the filter to that chemical. Reverse osmosis for 1,4-dioxane. NSF 53, P473, or reverse osmosis for PFAS. Put the unit on the drinking tap first. That is the glass you use for coffee, cooking water, and school bottles.
If a unit is already under the sink, next year is cartridges. A one-time purchase does not cover them. Write the change date on the filter housing with a marker. Replacement cartridges are their own page. A neglected membrane is a slow tap with the old chemistry still in it.
If you just bought, a closing folder can hold an old well paper and still miss the two chemicals this hamlet is known for. If that paper never named PFAS or 1,4-dioxane, it is not this kit. If it is years old, fill new bottles. A seller who never had a problem is not a test. Walk the side yard the week you get the keys. If there is a cap in the grass and no water-district bill, treat the kitchen as a well until a new lab report says otherwise.
This site is not a lab and not the county. Legal mail only: 65 Cedar Street, Kings Park, NY 11754. There is no personal phone on this page. The county well number is 631-852-5810 — that is them, not us.
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Common questions
How do I know if my Calverton house is on a well?
If you do not get a water-district bill and there is a well cap in the yard, treat the tap as a well. Calverton streets mix, so the house next door is not a guarantee.
Do Calverton streets mix wells and public water?
Yes. This Riverhead-town hamlet is mixed. One ranch can drink a well while the next house pays a district. Look at this address, not the block.
If my neighbor connected to public water, is my well still a well?
Yes, if this kitchen still drinks the well. A neighbor's main is their pipe. Yours is the cap in this yard until a district bill shows up for this house.
I rent in Calverton. How do I tell if the tap is a well?
Ask who pays the water. A water-district bill for this unit means public supply. No bill, plus a round cap in the grass or a pump in the basement, means treat the kitchen as a well. The landlord's word is not a lab report.
If the bill is unclear, do I call the water district about this Calverton address?
Yes. Call the district that serves this street and ask whether this address is on their system. If they say no, treat the kitchen as a well and mail the kit.
If the kitchen is on public water and a well only waters the lawn, do I still need the kit?
No. Skip the well kit if you do not drink that well. Filter the kitchen tap. The well-test buttons on this page are only for water you swallow.
What if this Calverton house is already on public water?
Skip the well kit. Start with the PFAS and 1,4-dioxane tap pages, and buy a filter that matches those chemicals.
Does Suffolk's $100 well test look for PFAS and 1,4-dioxane?
No. The county test (631-852-5810) is a cheaper, different panel. A mail-in lab kit is the one that looks for PFAS and 1,4-dioxane.
What is the difference between the two kit buttons on this page?
The first button is the mail-in lab class for this Calverton kitchen: bottles that look for 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.
Can I fill the bottles from a garden hose on a Calverton well?
No. Use the cold kitchen tap you drink from. A hose, an outdoor faucet, and the hot side are the wrong sample. Do not rinse a bottle that already has a preservative.
Are the Navy-Grumman site numbers my kitchen result?
No. Site tests at the old Calverton plant are not a score for this tap. If the house drinks a well, fill bottles at the kitchen. Then shop a filter if the report calls for one.
Is the old Calverton plant the same as the Bethpage plant?
No. Bethpage is Nassau, mostly public water, and a different plant. Calverton is a Riverhead-town hamlet on the East End. Do not copy a Bethpage water bill onto a Calverton well.
Does the plant cleanup mean I can skip a well test?
No. Cleanup is a site job. A plume toward the Peconic is not the glass you poured this week. If you drink the well, test the well.
Does a pitcher remove 1,4-dioxane from a Calverton well?
No. A fridge pitcher does not take 1,4-dioxane out of the water. Reverse osmosis under the sink is the usual fix.
Does one reverse-osmosis unit cover both 1,4-dioxane and PFAS at this sink?
Reverse osmosis is the overlap. NSF 53 or P473 without reverse osmosis is a PFAS path, not a 1,4-dioxane path. Match the box to the chemical on the report.
Should I wait for the lab report before I buy a whole-house system?
Usually yes. An under-sink reverse-osmosis unit is the common first step. Whole-house is a bigger job. Most households treat the drinking tap first.
If I just bought a Calverton house, is the seller's old well test enough?
Only if it is recent and it looked for PFAS and 1,4-dioxane at the kitchen tap you drink. A closing paper that skipped those chemicals is not this kit. Walk the yard, then fill new bottles if you drink the well.
Navy-Grumman site tests: 1,4-dioxane 14.9 ppb against New York's 1 ppb limit; PFNA 7,580 ppt against a 10 ppt limit. Plume toward the Peconic; remediation study talked about toward 2039. Suffolk County well counts and the county's $100 well test at 631-852-5810. New York drinking-water standards. 1978 sole-source aquifer designation.