Maryland Well Regulations — What Private Well Owners Need to Know
Maryland Well
Regulations Guide
Private well owners in Maryland have specific legal obligations — from permits and setbacks to water testing requirements. Here is what you need to know to stay compliant and keep your water safe.
Deep Dive Plumbing Maryland handles all permits, water testing, and licensed well plumbing work in Calvert County and Anne Arundel County. We know Maryland's regulations inside and out — and we make compliance easy for homeowners and sellers alike.
Key Maryland Well Regulations
Well Permits (COMAR 26.04.04)
Any new well, well deepening, or well reconstruction in Maryland requires a permit from the Maryland Department of the Environment (MDE). The permit must be obtained before drilling begins. Well drillers must be licensed by MDE. Homeowners cannot drill their own wells.
Well Setback Requirements
Maryland requires minimum setback distances between wells and potential contamination sources: 100 feet from a septic system drain field, 50 feet from a septic tank, 25 feet from a property line, and 10 feet from a building foundation. These setbacks protect groundwater quality.
Well Construction Standards
Wells must be constructed with a minimum 6-inch diameter casing, grouted to prevent surface water infiltration, and capped with a sanitary well cap. The casing must extend at least 12 inches above the finished grade. These standards prevent contamination from surface runoff.
Water Quality Testing Requirements
Maryland requires water quality testing when a new well is installed and when a property with a well is sold. The minimum test panel for a home sale includes bacteria (total coliform and E. coli), nitrates, and pH. Many lenders and buyers require a more comprehensive panel.
Well Abandonment
When a well is taken out of service, it must be properly abandoned — filled with grout from bottom to top — to prevent it from becoming a conduit for surface contamination to reach the aquifer. Improper well abandonment is a violation of Maryland law.
Plumber Licensing for Well Pump Work
In Maryland, work on the pump, pressure tank, and plumbing components of a well system must be performed by a licensed plumber. The well casing, cap, and borehole are the domain of a licensed well driller. Deep Dive Plumbing Maryland holds a Maryland Master Plumber license (#98433) and handles all pump-side well work.
Why Compliance Matters
Maryland's well regulations aren't just bureaucratic requirements — they protect your health, your finances, and your ability to sell your home.
Contamination Risk
Non-compliant wells — those too close to septic systems, improperly cased, or with damaged caps — are vulnerable to bacterial and chemical contamination. Contaminated well water can cause serious illness. Maryland's setback and construction standards exist specifically to protect your family's health.
Legal Liability
If you perform unpermitted work on your well system and a problem arises — contamination, property damage, or injury — you may face significant legal and financial liability. Licensed, permitted work protects you. We pull all required permits and document everything.
Property Sale Complications
Unpermitted well work, failed water tests, and undisclosed well conditions can derail a home sale. Buyers' lenders — especially FHA, VA, and USDA — require documented water quality testing and may require repairs before closing. We help sellers get compliant before listing.
What Deep Dive Handles for Compliance
From permits to water testing to MDE coordination — we take care of the regulatory side so you don't have to.
Permit Acquisition
We obtain all required plumbing permits for well pump and pressure tank work in Calvert and Anne Arundel County.
Water Testing for Home Sales
Certified lab testing with full documentation packages for real estate transactions and lender requirements.
Well Abandonment Guidance
We assess old wells and coordinate with licensed well drillers for proper MDE-compliant abandonment.
Setback Verification
We verify well-to-septic setback distances and document compliance for real estate transactions.
MDE Coordination
We communicate directly with MDE and county health departments on your behalf for compliance matters.
Licensed Well Plumbing Work
All pump, pressure tank, and water line work performed under MD Master Plumber License #98433.
Water Testing for Home Sales
Selling a home with a private well in Maryland requires documented water quality testing. Here's what's required, what lenders demand, and what to expect from the process.
Maryland Minimum Requirements
Maryland law requires testing for total coliform bacteria, E. coli, nitrates, and pH at minimum for any home sale involving a private well. These tests must be performed by a certified laboratory using proper sample collection procedures.
- Total coliform bacteria
- E. coli (fecal coliform)
- Nitrates / nitrites
- pH level
FHA, VA & USDA Loan Requirements
Government-backed loans require significantly more extensive testing. If your buyer is using an FHA, VA, or USDA loan, expect to provide a full panel including:
- Lead
- Arsenic
- Iron and manganese
- Hardness
- Volatile organic compounds (VOCs)
- Full bacteria panel
Timeline & Cost
Sample collection takes approximately 30 minutes at your property. Standard lab results are returned in 24–72 hours. We can expedite for time-sensitive closings. A basic bacteria/nitrate panel runs contact us for a free estimate. A full panel for FHA/VA/USDA loans runs contact us for a free estimate depending on the number of parameters tested. We provide all documentation in lender-ready format.
18-Month Labor Warranty
Every job we complete — including well system services — is backed by our 18-month parts and labor warranty. If something we installed or repaired fails within 18 months, we come back and make it right. No arguments, no service call fees.
- 18 months on all labor
- Manufacturer warranty on all parts
- No service call fee for warranty work
- Same technician returns when possible
Financing Available
Well systems, water treatment, and major plumbing repairs can be significant investments. We offer financing options to help spread the cost over time — so you can get the work done right without waiting.
- Flexible payment plans available
- Apply in minutes — quick approval
- No prepayment penalties
- Ask us about current financing offers
Ready to get started?
Call us or request an estimate online. Written estimate before any work begins.
Frequently Asked Questions
Do I need a permit to replace my well pump in Maryland?
No — replacing a well pump is plumbing work and does not require a well permit from MDE. It does require a plumbing permit in most Maryland jurisdictions, which your licensed plumber obtains. Deep Dive Plumbing Maryland handles all permits for pump replacement work.
What water tests are required when selling a home with a well in Maryland?
Maryland requires testing for bacteria (total coliform and E. coli), nitrates, and pH at minimum. Many lenders (FHA, VA, USDA) require additional testing including lead, arsenic, and other parameters. We recommend a comprehensive panel for any home sale to avoid surprises during the transaction.
How close can a well be to a septic system in Maryland?
Maryland requires a minimum of 100 feet between a well and a septic drain field, and 50 feet between a well and a septic tank. These are minimums — greater separation is always better. If your well and septic system are closer than these distances, your well water should be tested annually for bacteria and nitrates.
Who regulates private wells in Maryland?
The Maryland Department of the Environment (MDE) regulates well construction, permitting, and water quality standards. County health departments enforce local regulations and handle water quality complaints. The Maryland Board of Well Drillers licenses well drilling contractors.
What happens if I have an old abandoned well on my property?
Abandoned wells that have not been properly sealed are a contamination risk and a liability. Maryland law requires proper abandonment (grouting from bottom to top) when a well is taken out of service. If you have an old well on your property, contact MDE or a licensed well driller to assess whether it needs to be properly abandoned.
What water tests are required for a VA or FHA loan with a well?
VA, FHA, and USDA loans require bacteria (total coliform and E. coli), nitrates, lead, arsenic, and often a full panel depending on the lender. We provide certified lab testing and complete documentation packages for lenders — including chain of custody forms and certified results.
How long does well water testing take for a home sale?
Sample collection takes approximately 30 minutes at your property. Lab results are typically returned in 24–72 hours. We can expedite testing for time-sensitive closings. We provide all documentation in the format required by your lender or title company.
What is a well disclosure in Maryland?
Maryland requires sellers to disclose the existence of a well and provide recent water test results as part of the real estate transaction. We provide complete documentation packages for real estate transactions, including test results, system condition reports, and any required certifications.
Can I drill a new well on my property in Maryland?
New well drilling requires an MDE permit and must be performed by a licensed well driller. We can refer you to licensed drillers in Calvert and Anne Arundel County and handle all plumbing connection work — pressure tank, pump wiring connections, and house plumbing tie-in — after the well is drilled.
What happens if my well water fails testing at closing?
If water tests fail, the seller typically must remediate before closing. We provide shock chlorination for bacteria failures, treatment system installation for chemical failures, and retesting to clear failed results quickly. We work with your real estate agent and title company to meet closing deadlines.
What Our Well Service Customers Say
Real reviews from real Southern Maryland homeowners.
Jess
Local Guide
Southern Maryland
May 2026
"We had a mystery leak in our bathroom and everyone who saw it was convinced it was coming from inside the wall. He came out, checked everything, and was super thorough instead of just guessing. Turns out it was actually a leak from the toilet tank that was dripping in a way that made it look like it was coming from the opposite wall. He was super patient with all of our questions and explained the fix. We really appreciated his professionalism and transparency. Having an older home, it can be stressful not knowing what kind of repair you're walking into. I highly recommend him if you want someone trustworthy and knowledgeable who genuinely just wants to help."
Kara Gross
Local Guide
Southern Maryland
May 2026
"Fantastic! Quick response time, knowledgeable, and did a wonderful job replacing our water heater and saving the day! TJ is a really great guy. Highly recommend."
Savannah Foster
Southern Maryland
May 2026
"Absolutely blown away by the service from Deep Dive Plumbing Maryland! We had ongoing issues with our well water for years — bad smell, staining, and constant problems with pressure — and nobody ever took the time to truly figure out the root cause. Terry and the team came out, performed a full water analysis, explained everything in detail, and designed a system specifically for our home instead of just trying to sell us random equipment. You can really tell they care about doing things the right way. The install was extremely clean and professional, they walked us through how everything works, and our water has never looked or tasted better. The difference is unbelievable."
Maryland Well Regulations Service Areas
Serving Calvert County and Anne Arundel County, Maryland.
Questions About Your Well?
We handle all permits and code compliance for well pump work in Calvert and Anne Arundel County. Licensed master plumber #98433.
Call (443) 440-0632