PENNSYLVANIA · OUR GREENVILLE OFFICE IS IN THE COUNTY
Mercer County is home. Our main office sits on Mercer Road in Greenville, and the county’s wells, water tables, and townships are the ones we know best, from Hermitage and Sharon to Grove City and Jamestown.
Serving our communities since 1967
WHERE WE WORK IN MERCER COUNTY
From Hermitage to Greenville, we’re proud to serve the communities of Mercer County with reliable, local water system expertise.
Between towns, or not on the list? We cover the whole county, so call and we’ll schedule from Greenville.
WHAT WE DO IN MERCER COUNTY
Whether you’re on a private well or city water, the same crew handles the water source, the pressure, and what comes out of the tap.
Whether you’re building a new home or upgrading an existing water source, we offer expert residential and commercial well drilling. Our experienced team uses the right method for your property, cable tool or air rotary drilling, ensuring a dependable water supply.
Tackle tough water problems with our custom water treatment systems. We address issues like iron, sulfur, manganese, PFAS, chlorine, and bacteria, improving your water’s taste, safety, and clarity, on well water and on city water.
Keep your well running strong with our full range of pump and pressure system services. We install, repair, and maintain pumps and pressure tanks for consistent, efficient water flow.
WATER IN MERCER COUNTY
Thirteen of the 15 Mercer County towns on our map sit inside a public water system on EPA's map, and the two largest systems draw on the Shenango River. Even so, the well logs around each of those towns run to the hundreds.
Two Aqua PA systems take their water from the Shenango River. The Shenango Valley system serves about 48,000 people, and five towns on our map fall inside it: Farrell, Hermitage, Mercer, Sharon and West Middlesex. Aqua's Greenville system serves about 8,600. The Sharpsville Borough Water Company buys its supply from the Shenango Valley system.
The other six systems pump groundwater from their own wells: Stoneboro from six active wells, Grove City and Sandy Lake from four, Jamestown from three, Fredonia and Lake Latonka from two. Sandy Lake and Stoneboro each list the other as a seller. EPA's map shows no system at Clark or Sheakleyville, which is not proof that no home there is connected; any home on a public line gets its water report from the utility. What these systems do to the water is on the Mercer County treatment page.
USGS holds 2,406 groundwater site records for Mercer County, with a median depth of 90 feet and a middle half between 65 and 130. The town medians come from a separate set, the logs within 5 miles of each town center. West Middlesex (110 feet), Farrell (107) and Greenville (105) sit at the deep end; Stoneboro (82), Lake Latonka (81) and Sheakleyville (80) sit at the shallow end.
Median yields run from 15 gallons a minute around Farrell, Hermitage, Sharon, Sharpsville and West Middlesex to 25 around Greenville, Grove City, Sandy Lake and Stoneboro. Those figures are a starting point for a new well, not a promise for one property, and the cost page explains what moves the price.
The Cuyahoga Group is mapped at six town centers: Clark, Farrell, Greenville, Sharon, Sharpsville and West Middlesex. The Pottsville Formation is mapped at four (Fredonia, Grove City, Hermitage and Mercer), the Shenango Formation at four more (Lake Latonka, Sandy Lake, Sheakleyville and Stoneboro), and Berea Sandstone through Venango Formation at Jamestown.
Depth to bedrock in the logs is a median of 18 to 30 feet around most towns. Sandy Lake (35), Stoneboro (40) and Grove City (50) have more ground above the rock. A formation name describes the rock at one mapped point, not under every lot, so the logs closest to a property say more about it. On an older well, a well inspection and pump service come from the same Greenville crew that drills new ones.
Source: Water quality: USGS National Water Information System results for Mercer County wells, served through the Water Quality Portal, sampled between 1928 and 2023, retrieved 2026-09-14. Each well counts once, as the median of its samples. The 0.3 mg/L iron and 0.05 mg/L manganese marks are EPA secondary standards, which are aesthetic limits, not health limits. Well depth: USGS groundwater site inventory for Mercer County, 2,406 wells with a recorded depth, retrieved 2026-09-14.
WHY MERCER COUNTY CHOOSES CHATFIELD
Rated 4.7 on Google across 104 reviews. Here is what working with us looks like, in a customer’s words.
“Chatfield Drilling replaced a submersible pump, extended our well casing above ground, and installed a sanitary cap at our farm house. This is our first experience with a well. Both Matt and Sam were happy to answer all of our questions, no matter how small, in a way that we could understand and enabled us to make informed decisions.”
ALSO SERVING
We cover ten counties in two states from the same two offices. If you’re near a county line, either page gets you the same crew.
A LITTLE CLARITY
Yes, and it is where we drill most. Chatfield drills residential, agricultural, geotechnical, and environmental wells across Mercer County with air rotary and cable tool rigs matched to the ground on your property, with PA DEP permit assistance and water flow testing as part of the job.
Existing Chatfield customers can order chlorine, Hach test supplies, and Stenner feed pump parts from our online shop and pay on the invoice. For other parts, call the office. The crews that install and service the equipment are based in Greenville.
Our Greenville office is at 854 Mercer Rd., Greenville, PA 16125, inside Mercer County, about 14 minutes from Mercer by road. Service calls across the county are scheduled from there.
All of them. Our service map lists 15 Mercer County communities, including Greenville, Grove City, Hermitage, Jamestown, Mercer, Sharon, and the townships between them. If your town is not on the map, call anyway; the county line is the boundary, not the town list.
In USGS records for 102 Mercer County wells, the median hardness was 130 mg/L as calcium carbonate, about 7.6 grains per gallon, and 59% of wells were hard or very hard. A softener sized to your test result handles it. The test comes first because hardness varies well to well, even on the same road.
Often. 58% of the Mercer County wells in USGS records were above 0.3 mg/L of iron, the level where orange staining starts, and 54% were above 0.05 mg/L of manganese, the level behind black marks and a metallic taste. The FerronX Iron System treats iron and dissolved metals at the point of entry; testing establishes the level and the right configuration.
USGS has depth records for 2,406 Mercer County wells: the median is 90 feet, and the middle half fall between 65 and 130 feet. Your well's depth depends on the formation under your property and the yield your household needs, which is why Chatfield tests water flow rather than drilling to a number.
Talk with the Chatfield team.
(724) 588-2652A LITTLE KNOWLEDGE GOES A LONG WAY
WATER TESTINGWhat a test measures, what the results mean, and what happens next.
WELL DRILLINGWhat drives the price of drilling a well in our region, and what to ask before you sign.
WATER PROBLEMSThe signs, what causes hardness in our region, and how to confirm it.
YOUR NEXT STEP
Tell us what you’re noticing. We’ll come out from Greenville, test your water, and walk you through the next step.