Introduction
You're buying an acreage near Calgary. You've found the perfect property. You've made an offer. You're in your inspection period.
And then the well report arrives.
It's two pages of numbers, technical abbreviations, test results, and hydrogeological jargon. You stare at it. You have absolutely no idea what you're looking at.
GPM. Static water level. Total depth. Drawdown. Recovery rate. Total dissolved solids. Coliform bacteria. Nitrate levels.
What does any of this mean? Is this well good or bad? Should you proceed with the purchase or negotiate? Should you walk away entirely?
Most acreage buyers forward the well report to their realtor and ask: "Is this okay?" And if their realtor doesn't specialize in rural properties, the answer is often: "Looks fine to me" — based on nothing more than a quick glance at numbers they don't fully understand.
And then you buy the acreage. And six months later, you discover the well can't keep up with your family's water usage. Or the water quality is terrible and requires expensive treatment. Or the well is old and failing and needs to be replaced at a cost of $20,000-$30,000.
This post teaches you how to read a well report like a professional — what the numbers actually mean, what's acceptable versus problematic, and how to use well data to make informed decisions about whether to proceed, negotiate, or walk away from an acreage purchase.
Why Understanding Well Reports Matters
Before we dive into how to read the report, let's establish why this matters.
Wells Are Not Regulated Like Municipal Water
When you buy a home in Calgary connected to municipal water, you don't evaluate the water supply. The city guarantees water pressure, volume, and quality.
But when you buy an acreage with a private well, you're responsible for your own water supply. There's no guarantee. No utility backing you up. No recourse if the well doesn't perform.
You own the well. You own the problems.
Bad Wells Cost Tens of Thousands to Fix
Scenario 1: Low Yield Well
You buy an acreage with a well that produces 2 GPM (gallons per minute). Your family needs 5-8 GPM for normal use. You're constantly running out of water.
Solution: Drill a new well. Cost: $15,000-$30,000.
Scenario 2: Contaminated Water
Your well tests positive for bacteria or high nitrates. The water isn't safe to drink.
Solution: Install water treatment systems (UV sterilization, reverse osmosis, filtration). Cost: $3,000-$8,000+ depending on systems needed.
Scenario 3: Failing Old Well
The well is 35 years old. The casing is corroding. The yield is declining. The well is failing.
Solution: Drill a new well. Cost: $15,000-$30,000.
Wells Are Difficult to Evaluate After Purchase
Once you own the property, discovering well problems becomes your financial burden.
Before Purchase:
You can negotiate price reductions
You can require sellers to fix issues
You can walk away with no penalty (during inspection period)
After Purchase:
You own the problem
You pay to fix it
No recourse against the seller (unless they knowingly misrepresented the well, which is hard to prove)
The Window:
You have maybe 10-14 days during your inspection period to evaluate the well and make decisions. After that, you're committed.
Learning to read well reports allows you to make informed decisions during that critical window.
The Five Numbers That Matter Most
Well reports contain dozens of data points. But for most acreage buyers, five numbers tell you 90% of what you need to know.
Number 1: Well Yield (GPM - Gallons Per Minute)
What It Is:
Well yield is how much water the well can produce, measured in gallons per minute (GPM).
How It's Tested:
A pump test is run. The well is pumped continuously, and the flow rate is measured. The report will state the yield — for example, "Well tested at 8 GPM" or "Estimated yield: 3.5 GPM."
What You Need:
Minimum: 3-5 GPM for a single-family home Ideal: 8-10+ GPM Excellent: 12+ GPM
Why It Matters:
Your household water usage during peak periods determines how much yield you need.
Peak Usage Example:
Two showers running: 4-6 GPM
Dishwasher: 1-2 GPM
Washing machine: 2-3 GPM
Toilet flushing: 1-2 GPM
If multiple activities happen simultaneously (morning routine with showers, laundry, dishwasher), you could easily need 8-10 GPM.
What Happens If Yield Is Too Low:
At 2-3 GPM: You'll run out of water if anyone runs a shower while the dishwasher or washing machine is operating. You'll need to ration water usage — only one activity at a time.
At 1-2 GPM: Severely limited. You can't run a shower and flush a toilet simultaneously without running dry. Essentially unusable for a family.
At 8-10+ GPM: Abundant water. You can run multiple showers, appliances, and outdoor watering without concern.
Red Flags:
Yield below 3 GPM: Inadequate for most families
Yield below 2 GPM: Essentially non-functional for residential use
"Estimated yield" vs. "tested yield": Estimated means they didn't actually test it — be skeptical
What to Do:
Below 3 GPM: Negotiate a $20,000-$30,000 price reduction to cover drilling a new well, or walk away.
3-5 GPM: Marginal. Consider negotiating a $5,000-$10,000 reduction or requiring seller to demonstrate the well can support your usage.
8+ GPM: Excellent. Proceed confidently.
Number 2: Static Water Level
What It Is:
Static water level is the depth at which water sits in the well when the pump is not running. Measured in feet below ground surface.
Example:
"Static water level: 60 feet" means the water surface is 60 feet below ground level when the well is at rest.
Why It Matters:
Static water level tells you:
How deep the pump has to lift water (affects pump efficiency and operating costs)
How much water column exists in the well (important when combined with total depth)
What's Good vs. Bad:
Shallow Static Level (20-50 feet): Water is relatively close to the surface. Pump doesn't have to work as hard. Lower operating costs.
Moderate Static Level (50-100 feet): Normal for many wells in Alberta. Pump works moderately hard.
Deep Static Level (100-200+ feet): Water is deep. Pump works very hard. Higher operating costs. More pump wear.
What to Do:
Static water level by itself isn't a deal-breaker. What matters is the relationship between static level and total well depth (see next section).
But if static level is very deep (150+ feet), be aware:
Higher pump operating costs
More pump maintenance
If the well is shallow relative to static level, you have a problem
Number 3: Total Depth of Well
What It Is:
Total depth is how deep the well was drilled, measured in feet from ground surface to the bottom of the well.
Example:
"Total depth: 140 feet" means the well was drilled 140 feet deep.
Why It Matters:
The critical metric is the water column depth — the amount of water sitting in the well between the static water level and the bottom of the well.
Water Column Calculation:
Water Column Depth = Total Depth - Static Water Level
Example 1 (Good):
Static water level: 60 feet
Total depth: 150 feet
Water column: 90 feet
This is excellent. You have 90 feet of water sitting in the well. Seasonal fluctuations or drought won't dry you up.
Example 2 (Bad):
Static water level: 80 feet
Total depth: 90 feet
Water column: 10 feet
This is inadequate. You only have 10 feet of water. If water levels drop seasonally or during drought, you could lose your water supply entirely.
What You Need:
Minimum: 30 feet of water column Good: 50+ feet of water column Excellent: 80-100+ feet of water column
Why Water Column Matters:
Seasonal Fluctuations: Water levels drop during dry periods and rise during wet periods. If you only have 10-20 feet of water column, a dry summer could drop your water level below the pump intake, and you'll have no water.
Drawdown During Pumping: When the pump runs, the water level drops temporarily (called drawdown). If your water column is thin, drawdown could pull the level below the pump, causing the pump to run dry (which damages pumps).
What to Do:
Water column less than 30 feet: Red flag. Negotiate or walk away. This well is vulnerable to seasonal fluctuations and may run dry.
Water column 30-50 feet: Marginal. Acceptable if yield is good and water quality is clean, but monitor water levels during dry periods.
Water column 50+ feet: Good. Proceed confidently.
Number 4: Water Quality (Bacteria and Nitrates)
What It Is:
Water quality testing analyzes the well water for bacterial contamination, chemical contaminants, and mineral content.
Key Tests:
Bacterial Tests:
Total Coliform Bacteria
E. Coli
Fecal Coliform
Chemical Tests:
Nitrates
Arsenic
Iron
Hardness (calcium and magnesium)
Total Dissolved Solids (TDS)
pH
What You're Looking For:
Bacteria:
Total Coliform Bacteria: Indicator of potential contamination. Presence suggests the well may be vulnerable to surface water infiltration or contamination.
E. Coli: Indicates fecal contamination. Serious health risk. Water is unsafe to drink without treatment.
Acceptable Result: None detected (or "absent")
Unacceptable Result: Present or detected
Nitrates:
Nitrates come from agricultural runoff, fertilizers, or septic systems leaching into groundwater.
Safe Level: Below 10 mg/L (milligrams per liter) Health Risk: Above 10 mg/L, especially for infants and pregnant women
High nitrate levels cause "blue baby syndrome" in infants (methemoglobinemia).
Other Common Issues:
High Iron: Causes rust staining on fixtures, metallic taste, and discoloration. Requires iron filtration system.
High Hardness: Mineral buildup in pipes, poor soap lathering, scale on fixtures. Requires water softener.
Arsenic: Naturally occurring in some Alberta groundwater. Health risk at levels above 10 µg/L (micrograms per liter). Requires specialized filtration.
What to Do:
Bacteria Present (Total Coliform or E. Coli): Water needs treatment. UV sterilization system costs $1,500-$3,000. Chlorination systems cost $2,000-$5,000.
Negotiate with seller to install treatment or provide a credit, or walk away if contamination is severe or cause is unknown.
Nitrates Above 10 mg/L: Health risk. Requires reverse osmosis system ($1,500-$4,000) or whole-house nitrate removal system ($3,000-$6,000).
Negotiate with seller or walk away.
High Iron, Hardness, or Other Minerals: Less serious but affects water quality and appliance lifespan. Budget $1,000-$3,000 for filtration or softening systems.
Clean Results (No Bacteria, Low Nitrates, Acceptable Minerals): Excellent. Proceed confidently.
Number 5: Age of Well
What It Is:
When was the well drilled? This is usually noted on the well report, or you can check municipal well drilling records.
Why It Matters:
Wells have a functional lifespan of approximately 30-50 years, depending on:
Casing quality (steel vs. PVC)
Water chemistry (corrosive water shortens lifespan)
Maintenance history
Depth and geology
What to Expect:
Wells 0-15 Years Old: Generally in excellent condition. Minimal concern.
Wells 15-30 Years Old: Middle age. Should be functioning well if properly maintained. Monitor for signs of decline.
Wells 30-40 Years Old: Aging. Increased risk of casing corrosion, declining yield, and contamination. Budget for potential replacement within 5-10 years.
Wells 40+ Years Old: Nearing or past end of functional life. High risk of failure. Replacement likely needed soon.
What to Do:
Well 0-20 Years Old: Minimal concern. Proceed confidently if other metrics are good.
Well 20-30 Years Old: Monitor. If yield, depth, and quality are all excellent, proceed. If any issues exist, be aware the well is aging and may need replacement sooner rather than later.
Well 30+ Years Old: Budget for replacement. If the well is showing any issues (declining yield, water quality problems, frequent pump failures), negotiate a $15,000-$30,000 price reduction to cover new well drilling costs.
Well 40+ Years Old: Unless the well is performing flawlessly and all metrics are excellent, assume replacement will be needed within 5 years. Negotiate accordingly or walk away.
How to Read a Well Report: Step-by-Step
Now let's walk through reading an actual well report.
Step 1: Find the Well Yield
Look for a section labeled:
"Pumping Test Results"
"Well Yield"
"Production Rate"
"Flow Rate"
Example:
"Well tested at 7.5 GPM for 4 hours with minimal drawdown."
What This Means:
The well produced 7.5 gallons per minute continuously for 4 hours during testing, and the water level didn't drop significantly (minimal drawdown).
Assessment: 7.5 GPM is good for a family home. Proceed.
Step 2: Find the Static Water Level and Total Depth
Look for:
"Static Water Level" (or "SWL")
"Total Depth" (or "TD")
Example:
"Static Water Level: 65 feet below ground surface" "Total Depth: 180 feet"
Calculate Water Column:
180 feet (total depth) - 65 feet (static level) = 115 feet of water column
Assessment: Excellent water column depth. Proceed.
Step 3: Check Water Quality Results
Look for the section labeled:
"Bacteriological Analysis"
"Chemical Analysis"
"Water Quality Test Results"
Example:
Bacteriological:
Total Coliform: Absent
E. Coli: Absent
Chemical:
Nitrate (as N): 4.2 mg/L
Iron: 0.8 mg/L
Hardness: 220 mg/L (as CaCO3)
pH: 7.3
Assessment:
Good: No bacteria, nitrates well below 10 mg/L, low iron, moderate hardness (may want a water softener but not critical), neutral pH.
Proceed confidently.
Step 4: Determine Well Age
Look for:
"Date Drilled"
"Well Construction Date"
Or check municipal well drilling records (available through Rocky View County, Foothills County, etc.)
Example:
"Well drilled: March 2008"
Calculate Age:
2026 - 2008 = 18 years old
Assessment: Middle-aged well. Should be in good condition. Proceed.
Step 5: Make Your Decision
Scenario A: All Metrics Good
Yield: 7.5 GPM ✓
Water column: 115 feet ✓
Water quality: Clean, no bacteria, low nitrates ✓
Age: 18 years ✓
Decision: Excellent well. Proceed with purchase confidently.
Scenario B: One or Two Issues
Yield: 4 GPM (marginal)
Water column: 40 feet (marginal)
Water quality: Total coliform present (needs UV treatment)
Age: 25 years (aging but acceptable)
Decision: Marginal well with fixable issues. Negotiate $5,000-$8,000 price reduction to cover UV treatment and acknowledge marginal yield and aging well. Or require seller to install UV system before closing.
Scenario C: Multiple Serious Issues
Yield: 2.5 GPM (inadequate)
Water column: 15 feet (very low)
Water quality: E. coli present, nitrates 18 mg/L (contaminated)
Age: 35 years (old)
Decision: Problem well. Likely needs complete replacement. Negotiate $20,000-$30,000 price reduction or walk away. This well will be expensive to fix and may fail soon.
Common Well Report Red Flags
Red Flag 1: "Estimated Yield" Instead of "Tested Yield"
What It Means:
The well wasn't actually pump-tested. The driller or inspector estimated yield based on visual observation or brief testing.
Why It's a Problem:
Estimated yields are often optimistic and unreliable. The well might produce significantly less than estimated.
What to Do:
Request an actual pump test (cost: $500-$800 typically) before closing. Make your offer conditional on satisfactory pump test results.
Red Flag 2: Very Low Water Column (Less Than 20 Feet)
What It Means:
The well has minimal water storage. Seasonal fluctuations or drought could cause water supply failure.
What to Do:
Walk away or negotiate significant price reduction. This well is vulnerable and may need replacement.
Red Flag 3: Recurring Bacterial Contamination
What It Means:
If the well has a history of bacterial contamination (multiple tests showing bacteria even after treatment), the well casing may be compromised or surface water is infiltrating.
What to Do:
This is a serious structural problem. UV treatment masks the issue but doesn't fix the root cause. Walk away or require seller to drill a new well.
Red Flag 4: Declining Yield Over Time
What It Means:
If you can access historical well data and yield has declined significantly (e.g., was 8 GPM ten years ago, now 3 GPM), the well is failing.
Causes:
Casing deterioration
Screen clogging
Aquifer depletion
Mechanical problems
What to Do:
Budget for well replacement ($15,000-$30,000) or walk away.
Red Flag 5: Extremely High Nitrates or Chemical Contamination
What It Means:
Nitrates above 20-30 mg/L or presence of arsenic, uranium, or other serious contaminants indicates significant groundwater contamination.
What to Do:
Investigate the source. Is it agricultural runoff? Septic leaching? Natural geology?
Treatment is expensive and may not fully resolve the issue. Consider walking away unless the property is otherwise exceptional and seller provides significant price concession.
What to Do If the Well Report Is Bad
Option 1: Negotiate Price Reduction
Calculate Costs:
New well drilling: $15,000-$30,000
Water treatment systems: $3,000-$8,000
Well abandonment (sealing old well): $1,500-$3,000
Request Reduction:
If a new well is needed, request a price reduction of $20,000-$35,000 to cover costs.
Example:
"The well yield is 2.5 GPM, which is inadequate for residential use. Drilling a new well will cost approximately $25,000. We're requesting a price reduction of $25,000 to proceed with the purchase."
Option 2: Require Seller to Fix Issues
Alternative Approach:
Instead of a price reduction, require the seller to:
Drill a new well before closing
Install water treatment systems
Provide a warranty on well performance
Why This Can Be Better:
You ensure the work is done properly and you're not stuck coordinating contractors after purchase.
Risk:
Seller may refuse or do minimal work to satisfy the requirement.
Option 3: Walk Away
When to Walk:
Well is severely inadequate (yield below 2 GPM)
Multiple serious issues (low yield + contamination + old age)
Seller refuses to negotiate or address problems
Well replacement cost exceeds your budget or willingness to invest
Remember:
You're in the inspection period. You can walk away with no penalty. Don't let emotional attachment to the property override the reality of a bad well.
A $25,000 well replacement on a $750,000 property might be acceptable. But a $25,000 well replacement plus unknown ongoing water quality issues? Maybe not worth it.
Additional Well Report Details (For Advanced Readers)
If you want to go deeper, here are additional metrics and what they mean.
Drawdown
What It Is:
How much the water level drops when the pump is running.
Why It Matters:
Minimal drawdown means the aquifer is recharging quickly. Significant drawdown means the well struggles to keep up with pumping.
What's Good:
Drawdown of 5-15 feet during pumping = excellent Drawdown of 30-50+ feet = concerning (well may struggle to keep up with demand)
Recovery Rate
What It Is:
How quickly the water level returns to static level after pumping stops.
Why It Matters:
Fast recovery (minutes to an hour) = good aquifer recharge Slow recovery (hours to days) = poor recharge, well may not be able to sustain continuous use
Total Dissolved Solids (TDS)
What It Is:
Total amount of dissolved minerals in the water, measured in mg/L or ppm (parts per million).
What's Acceptable:
Below 500 mg/L: Excellent, fresh water
500-1,000 mg/L: Acceptable, slightly mineralized
1,000-3,000 mg/L: High TDS, may taste salty or mineral-heavy
Above 3,000 mg/L: Very high, may require treatment or be unpalatable
Why It Matters:
High TDS affects taste and can cause scaling in pipes and appliances. Very high TDS (above 2,000 mg/L) may require reverse osmosis for drinking water.
pH
What It Is:
Acidity or alkalinity of the water, measured on a scale of 0-14.
What's Acceptable:
6.5-8.5: Normal and acceptable
Below 6.5: Acidic (can corrode pipes and fixtures)
Above 8.5: Alkaline (can cause scaling)
Why It Matters:
Extreme pH (below 6 or above 9) requires treatment to prevent plumbing damage.
FAQ: Well Reports and Acreage Buying
Do I need a well report for every acreage purchase?
Yes. Absolutely. Do not buy an acreage without a current well report (ideally within the past 6-12 months). If the seller doesn't have one, make your offer conditional on obtaining a satisfactory well report at seller's expense.
How much does a well report cost?
$300-$800 depending on testing depth (basic bacterial test vs. full chemical analysis) and whether a pump test is included.
Can I trust a well report that's 2-3 years old?
Preferably not. Well conditions change. Yields can decline. Water quality can deteriorate. Request a current report (within the past year) or make your offer conditional on obtaining a new report.
What if the well report shows bacteria but the seller says they've been drinking the water for years?
Some people drink contaminated water without immediate illness. That doesn't make it safe. Bacterial contamination is a real health risk, especially for children, elderly, or immunocompromised individuals. Require treatment or walk away.
Should I hire a hydrogeologist to review the well report?
For most acreage purchases, it's not necessary if you understand the five key metrics (yield, depth, quality, age). But if the well report shows unusual results or you're buying an expensive property, hiring a hydrogeologist for $500-$1,000 can provide expert analysis and peace of mind.
Can wells run dry?
Yes. Wells can run dry due to:
Drought or seasonal water level drops
Over-pumping (if yield is insufficient for usage)
Aquifer depletion (rare but possible in some areas)
This is why water column depth matters. Wells with minimal water column are vulnerable to running dry.
What if the well runs dry after I buy the property?
You're responsible. Drilling a new well costs $15,000-$30,000. This is why evaluating the well thoroughly before purchase is critical.
Conclusion
Reading a well report isn't complicated once you know what to look for.
Five numbers tell you 90% of what you need to know:
Well Yield (GPM): Need at least 3-5 GPM. Ideal is 8-10+. Below 3 GPM is inadequate.
Static Water Level vs. Total Depth: Calculate water column depth. Need at least 50+ feet of water below static level. Less than 30 feet is problematic.
Water Quality (Bacteria and Nitrates): No bacteria detected. Nitrates below 10 mg/L. Anything else requires treatment.
Age: Wells under 20 years are generally good. Wells 30+ years are aging and may need replacement soon.
Yield + Depth + Quality + Age = Your Decision
Good metrics across all four = proceed confidently.
One or two marginal issues = negotiate price reduction or treatment installation.
Multiple serious issues = walk away or demand significant concessions.
Don't buy an acreage with a well you don't understand. A bad well will cost you tens of thousands in replacement, treatment, and frustration.
If you're buying an acreage near Calgary and you need help reading well reports or understanding what the numbers mean for your specific situation — that's exactly the kind of technical guidance I provide buyers every week.
DM me the word WELL and let's make sure you're not buying a problem.
Related Reading
If you found this useful, these posts go deeper on acreage infrastructure and buying decisions:
5 Things Nobody Tells You Before Buying an Acreage Outside Calgary
Well Water vs Cistern: Which One Actually Makes Sense for Your Acreage?
Thinking of Buying an Acreage Near Calgary? Read This First.
About Kristen Edmunds
Kristen Edmunds is a Calgary-area REALTOR® and Associate Broker with KIC Realty, specializing in acreages, luxury homes, and smart buy/sell strategies. With expertise in rural properties (water wells, septic, equestrian facilities) and a client-obsessed approach, Kristen helps buyers and sellers achieve their real estate goals with confidence and ease.
