Well Drilling Costs in Delaware
Want the full breakdown? See our Delaware well drilling cost guide for per-foot rates, itemized components, and what quotes leave out.
A complete private well system in Delaware typically costs $3,000–$8,000, making it one of the more affordable states. Typical Delaware domestic wells are 50–150 ft deep.
| Component | Typical Cost | Notes |
|---|---|---|
| Drilling & casing | $25–$50/ft | Typical 100 ft well ≈$2,500–$5,000 per bobvila.com |
| Well pump + installation | $800–$1,500 | Typical submersible pump with wiring |
| Pressure/Storage tank | $300–$1,000 | Sized to household usage |
| Basic water testing | FREE | State test kits for bacteria/nitrates (no charge) |
| Well permit | $250 | Per well application; contractor normally files and includes the fee in the quote |
| Total (typical) | $3,000–$8,000 | Varies by depth; typical wells 50–150 ft deep |
Timeline: From Decision to Drinking Water
Expect 2–6 weeks from your first call to potable water. Permitting and contractor scheduling are the main variables.
| Step | Duration | Notes |
|---|---|---|
| Contractor selection & prep | 1–4 weeks | Get quotes, site evaluation, apply for permits |
| DNREC permitting | ~1–2 weeks | Licensed driller submits construction/use permit; DNREC screens for contamination |
| Drilling & installation | 1–3 days | Mobilize, drill well, case well, develop aquifer, disinfect, install pump/tank |
| System hookup & testing | 1–2 weeks | Connect plumbing; collect water samples. State lab returns results (~1 wk) |
Permits & Process
Step-by-Step Process
The typical process is:
- Hire a licensed contractor: Delaware law requires a DNREC-licensed well driller or contractor.
- Site evaluation: The driller surveys the property, ensuring setbacks to septic, property lines, etc. per 7 DE Admin. Code § 7301 (e.g. 50–100 ft from septic/sewers).
- Permit application: The licensed driller submits a Well Construction & Use permit application to DNREC. The homeowner typically signs the application but the contractor files it.
- State review: DNREC reviews the site for contamination risks (flagging any contaminants within 1,000 ft) and approves the permit.
- Drilling: The contractor drills the well (installing casing, screen, etc.) according to Delaware's well-construction standards. If unexpected conditions arise, the driller must notify DNREC immediately.
- Well finishing: After drilling, the well is developed (flooded/cleaned), disinfected, and a pump and pressure system are installed.
- Water testing: Samples (for bacteria, nitrates, etc.) are taken. Delaware provides free test kits for basic parameters.
- Reporting: Upon completion, the driller submits a well completion report to DNREC (for the state well database).
Who Does What?
Driller Handles:
- Hold current license
- Obtain permit through DNREC's e-Permitting system
- Ensure construction meets codes 7301 & 7302
- File required reports
Homeowner Handles:
- Sign permit application
- Pay contractor's fees
- Furnish site information (e.g. septic map)
- Coordinate testing
Water Quality
Well water testing in Delaware
Delaware DNREC and the Division of Public Health handles private well water quality in Delaware. Delaware recommends annual testing for coliform bacteria and nitrate; the state lab analyzes bacterial and chemical panels submitted through county offices.
Free or low-cost testing: Since 2023, Delaware residents can get free well test kits for their primary residence through the Division of Public Health.
Not sure what to test for? See our national guide to well water testing or order a certified lab test kit shipped to your door.
Recommended Testing Schedule
The Delaware Public Health Laboratory (DPHL) and CDC advise private well owners to test for coliform bacteria and nitrates at least once a year, and after any system change.
- Annually: Total coliform bacteria, E. coli, nitrates
- New well: Full chemical analysis including iron, hardness, pH
- After repairs: Bacteria testing mandatory
- Agricultural areas: Test for nitrates more frequently
- If taste/odor changes: Test immediately
Common Delaware Water Quality Issues
The DPH Environmental Chemistry Lab notes that well water tests often include nitrates, fluoride, chloride, sulfate, iron, hardness, sodium and pH, reflecting these common issues:
Iron & Hardness
Many wells have high iron and "hard" water (calcium/magnesium), causing staining and scaling. Water softeners and iron filters are common treatments.
Nitrates
Agricultural areas (especially Kent/Sussex counties) see elevated nitrates from fertilizers and manure. High nitrates are a concern for infants.
Coliform Bacteria
Shallow wells and failed septic systems can introduce bacteria or viruses. Testing for fecal coliform/E. coli is often needed.
Chloride/Sulfate
Coastal or low-lying areas (and road-salt runoff) can give salty/intrusive water (chloride) or sulfur odors.
Arsenic/Radon
Some pockets in northern Delaware (New Castle County) have naturally-occurring arsenic or radon, requiring special treatment if present.
Other Chemicals
In agricultural zones, trace levels of pesticides or nitrates may occur, though most Delaware wells test safe.
Regional "Hot Spots"
Due to Delaware's shallow aquifers, contamination vulnerability varies by area. Regions of heavy farming (Sussex and Kent) often show higher nitrates/pesticides. Northern New Castle County (especially along Newark Basin diabase intrusions) is known to have localized arsenic in groundwater. Coastal marsh areas may have higher chloride.
Treatment Options
Treatment is tailored to the problem:
- Bacteria/Viruses: Shock-chlorinate the well; continuous chlorination or UV systems
- Nitrates/Arsenic/Radon: Point-of-entry/point-of-use Reverse Osmosis or ion-exchange systems (RO is most common for arsenic/nitrates)
- Iron/Manganese: Specialty iron filters (e.g. greensand, catalytic media) or aeration + filtration units. Water softeners (cation exchangers) can remove moderate iron along with hardness
- Hardness (Ca/Mg): Water softeners (salt-based ion exchange or salt-free conditioners) reduce scale
- Low pH (acidic water): Calcite neutralizing filter or soda ash injection raises pH
- Turbidity/Sediment: Cartridge filters (5 µm or smaller) remove sand/silt; periodic backwashing
Maintenance & Troubleshooting
Annual Maintenance Checklist
Experts (EPA/DPH) advise annual well inspections for mechanical wear. Delaware's DNREC provides a "10 Tips" checklist for well owners (available in English and Spanish).
- Test water for bacteria and nitrates annually (many do this in spring)
- Inspect wellhead & pump: check well cap/security and pressure tank pressure yearly
- Ensure vents/screens are unclogged. Monitor pump cycle and pressure gauge
- Shock chlorination: disinfect the well and plumbing after any repair or if tests detect bacteria
- Clean filters: change sediment or carbon filters per manufacturer (often 6–12 months)
- Keep area clear: keep contaminants (fuel, chemicals, animal waste) away from the well head
Warning Signs of Well Problems
Homeowners should watch for:
- Sudden water quality changes: new taste, odor, or cloudiness
- Pressure oscillations: frequent pump cycling (rapid on/off)
- Reduced flow/pressure: drop in flow or pressure
- Discolored water: brown/red water suggests iron; black may suggest manganese
- Noise or leaks: unusual sounds from the pump or leaks at fittings/connections
- System malfunctions: tripping breakers or inability to start the pump
Find a Licensed Driller
Delaware law requires a DNREC-licensed water well contractor for all well drilling work.
Search Licensed Drillers in Delaware
Find Drillers Near You →How to Verify a Driller
To locate a certified well driller or pump installer, use DNREC's online list of licensed water well contractors and pump installers.
- Ask for their DNREC license number
- Contact the Water Well Licensing Board at (302) 739-9116 or DNREC's Division of Water at (302) 739-9116 to verify licenses
- Request proof of liability insurance ($100k/$300k bodily injury, $50k property damage minimum required)
- Get 2-3 written quotes
- Ask for references from recent jobs in your county
Resources & Contacts
DNREC Division of Water – Well Permits
Manages permits/inspections for residential wells
DNREC Water Well Licensing Board
Oversees licensing of drillers and pump installers
DPH – Office of Drinking Water
Public drinking water & private well guidance
DPH – Public Health Lab (DPHL)
Provides certified water testing (free kits for basic tests)
Key Regulatory References
- 7 DE Admin. Code 7301 – Regulations Governing the Construction and Use of Wells
- 7 DE Admin. Code 7302 – Regulations For Licensing Water Well Contractors and Installers
- DNREC ePermitting System – Application portal (paper forms being phased out)
Frequently Asked Questions
How much does it cost to drill a well in Delaware?
Do I need a permit to drill a well in Delaware?
How long does it take to drill a well in Delaware?
Is water testing required for private wells in Delaware?
What are common Delaware well water problems?
Sources & References
This guide is based on verified information from:
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