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Codette Lake Water Is Very Hard — Here's What It Costs You Each Year
10.88 GPG · 186 ppm · +67% vs Canadian average · 2025 report
Source: SaskWater Codette Lake Potable Water Supply System, 2025 report
Very HardCodette Lake water is very hard at 10.88 GPG (186 ppm). At this hardness a whole-house softener is strongly recommended — hard water here costs the average home roughly $1,338/year.
How we calculate this: based on the Battelle Memorial Institute study commissioned by the Water Quality Association (WQA), hard water is estimated to cost the average affected household roughly $800/year in 2010 dollars (~$1,230 today, after ~54% inflation). We scale that by 10.88 GPG versus a ~10 GPG reference. The percentages above come from the Battelle Memorial Institute study (commissioned by WQRF), the US Department of Energy, and the Water Quality Association. This is an estimate — not a certified per-household figure — and actual savings vary by water use, fuel type, and local rates.
Hardness
Parts per million
vs Canadian average
Contaminants in water
How Codette Lake Compares
Water hardness scale
| Classification | Grains per gallon (GPG) | mg/L (ppm) | What it means |
|---|---|---|---|
| Soft | 0–3.5 | 0–60 | No scale; softener unnecessary. |
| Slightly Hard | 3.5–7 | 60–120 | Minor spotting; conditioning optional. |
| Hard | 7–10.5 | 120–180 | Visible scale; softener recommended. |
| Very Hard← your water | 10.5+ | 180+ | Heavy scale; whole-home softener strongly recommended. |

Why Is Codette Lake Water So Hard?
The short answer is that you’re not drinking groundwater that has filtered through ancient limestone beds. Codette Lake is a reservoir on the North Saskatchewan River, and SaskWater’s Codette Lake Potable Water Supply System treats that surface water directly. So the hardness here isn’t about deep aquifers; it’s about what the river picks up on its long journey across the prairies before it ever reaches the lake.
The North Saskatchewan River starts in the Rocky Mountains and flows east through Alberta and into Saskatchewan. Along that route, the water runs over and through glacial till, shale, sandstone, and siltstone deposits left behind by retreating glaciers. Those materials are rich in soluble minerals, particularly calcium and magnesium carbonates and sulfates. Rain and snowmelt are naturally slightly acidic, and as the river water churns over this mineral-laden terrain, it dissolves those compounds. By the time the water is impounded behind the Codette Dam and forms the lake, it has accumulated a substantial load of dissolved hardness.
That puts Codette Lake at 10.88 grains per gallon (186 ppm), which the USGS classifies as “very hard” water. For context, the USGS considers anything above 7 GPG hard and above 10.5 GPG very hard, while the national average sits around 7.3 GPG. So this reservoir runs notably harder than the typical American tap. The geology is the whole story here: prairie surface water that has spent hundreds of miles dissolving mineral-rich glacial sediment. It’s not a contamination issue, and the EPA doesn’t regulate hardness as a health hazard. It’s classified only as an aesthetic concern under the Secondary Maximum Contaminant Level. But that doesn’t mean it’s harmless to your plumbing.
That mineral load has real consequences. According to the WQA and Battelle Memorial Institute’s 2010 detergent study, soft water can cut laundry detergent use by up to 50% and dish soap by up to 70% compared to hard water. On the heating side, Battelle and the WQRF found in 2009 that every 5 GPG of hardness costs roughly 4% efficiency in a gas water heater for a typical 50-gallon-per-day household. And the DOE warns that just a quarter-inch of scale buildup can slash water-heater efficiency by up to 40%. Hard water also shortens water-heater service life by an estimated 30-50%. That’s the practical price of that mineral-rich river water.
How Codette Lake Compares to Nearby Cities
Because SaskWater’s Codette Lake system draws from the North Saskatchewan River reservoir, any community pulling from the same source is dealing with essentially the same water chemistry. The hardness may vary slightly depending on treatment and seasonal river flow, but the geological fingerprint is identical. If a nearby town is also on the SaskWater Codette Lake PWSS, their water is coming from the same lake and will land in the same very hard category.
That shared source matters. Water hardness isn’t something a utility typically removes, since it’s not a regulated health contaminant. So the calcium and magnesium that make Codette Lake water test at 10.88 GPG are still present in the finished tap water delivered to homes. Neighboring communities on different supplies, such as those drawing from deeper groundwater wells or smaller local reservoirs, could test softer or harder depending on their own local geology. But for anyone on this specific SaskWater system, the water is what it is: very hard, straight from a prairie river reservoir.
The detected metals in the supply, including aluminum, arsenic, barium, cadmium, chromium, copper, iron, lead, and manganese, are monitored against EPA health limits. But hardness itself is a different beast. It’s not something SaskWater is required to strip out, and it’s not something that makes the water unsafe. It just means your water heater, washing machine, and faucets are working harder than they would in a soft-water town. If you’re noticing scale on fixtures or soap that won’t lather, you’re not imagining it. That’s the North Saskatchewan River’s mineral load showing up in your glass.
How does Codette Lake stack up against the rest of Saskatchewan? It's very hard at 10.88 GPG — White City, Edenwold, and Emerald Park sit nearby with different numbers. See the full hardest-water ranking for context.
See where Codette Lake sits on the Saskatchewan water hardness map →
Want the broader explainer on what hardness actually is and how it behaves? Read hard water vs. soft water, explained.
What 10.88 GPG Actually Does to a Codette Lake Home
At 10.88 GPG (186 ppm), Codette Lake water is +67% harder than the Canadian national average — and the damage shows up everywhere:
- Water heaters fail early. The Battelle Memorial Institute study found very-hard-water heaters failed in under 2 years, while softened-water units lasted the full 10-year test period. That's appliance life being burned through at 5× speed.
- Energy waste. Scale insulates the heating element, forcing the unit to work up to 9% harder — a direct, recurring cost on every bill.
- Constant descaling. Showerheads clog, faucet aerators crust over, and glassware never looks clean without a rinse aid.
- Up to 75% more detergent. Per the Water Quality Association, hard water sharply reduces soap effectiveness, and mineral residue roughs up fabric fibers, wearing clothes faster.
This isn't cosmetic. It's equipment and energy cost, quantified — at 10.88 GPG the running total is roughly $1,338 per year for an average 3–4 person home (see the calculator above — adjust the household size to see your number).
Do You Need a Water Softener in Codette Lake?
Yes — this is close to a non-negotiable. At 10.88 GPG, Codette Lake homeowners don't really debate whether to treat; they debate which system. The annual hard-water cost here is around $1,338, so a quality softener (~$1,000 installed) typically recovers its cost in well under a year.
Salt-free conditioners won't cut it at 10.88 GPG — they reduce scale but can't remove the minerals causing the soap, skin, and appliance problems. You need ion exchange. Size the unit to your household: a 32,000–48,000-grain softener handles a typical 3–4 person home at this hardness.
What Size Softener Does Codette Lake Need?
Sizing a softener is a two-number equation: your household's daily water use × your hardness. The rule of thumb is grains per day = (people) × (75 gallons) × (GPG).
- At 10.88 GPG, a family of four uses roughly 3,264 grains of hardness per day.
- A 32,000–48,000-grain softener regenerates roughly every 8–12 days — within the 3–7 day window that keeps salt and water use efficient.
- Round up, not down: an undersized unit regenerates too often and wastes salt. Metered (on-demand) regeneration saves the most salt and water.
For Codette Lake at 10.88 GPG, a 32,000–48,000-grain metered softener is the safe default for a 3–4 person home. A larger household, or one with unusually high water use, should size up to 64,000 grains.
What Are the Signs of Hard Water in a Codette Lake Home?
At 10.88 GPG (186 ppm), Codette Lake residents notice significant hard-water effects. The USGS classifies water above 7 GPG as hard and notes it causes measurable physical damage to plumbing and appliances.
- White or grey crust on faucet aerators, showerheads, and around drains — calcium carbonate depositing as water evaporates.
- Spotty glassware even after a full dishwasher cycle — mineral film left behind when water dries.
- Falling water-heater efficiency — scale insulates the heating element, forcing the unit to work harder and pushing up the energy bill.
- Flat, stiff hair — calcium bonds to hair proteins and prevents shampoo from rinsing clean.
- Dry, itchy skin — dissolved minerals disrupt the skin's moisture barrier.
- Weak soap lather — hardness ions react with soap to form insoluble scum instead of suds.
- Shorter appliance life — washing machines, dishwashers, and coffee makers accumulate internal scale.
The Battelle Memorial Institute study commissioned by the Water Quality Research Foundation found untreated very-hard-water heaters failed in under 2 years, versus a full 10 years on softened water. At Codette Lake's 10.88 GPG, that equipment degradation compounds faster than most homeowners expect.

Best Treatment for Codette Lake Homes
At 10.88 GPG you need serious capacity and real ion exchange. Two pieces of equipment cover most needs:
Aquasana SimplySoft 60,000-Grain Softener
For Codette Lake's 10.88 GPG — above the 10 GPG line where you want scale gone, not reduced. The 60,000-grain unit handles higher hardness and bigger households with less-frequent regeneration, which saves salt and water over time.
check current price
See on Aquasana →Aquasana SmartFlow Reverse Osmosis (drinking water)
The under-sink RO handles everything you drink. Removes lead, arsenic, fluoride, mercury, and PFOA/PFOS — then remineralizes for taste. The higher-purity companion to a whole-house softener or filter.
check current price
See on Aquasana →
A whole-house water softener pays for itself in roughly 9 months at Codette Lake's hardness level — after that, the savings accrue every year.
How Do You Test Water Hardness in Codette Lake?
This page reports Codette Lake's system-wide average (10.88 GPG), but your tap can vary slightly by neighborhood, pipe age, and in-home filtration. For a step-by-step, see how to test your water hardness at home — it walks through test strips, the free soap-shake check, TDS meters, titration kits, and certified lab tests.
- Test strips (~$10) give a GPG reading in about 30 seconds and are accurate enough to decide whether to invest in treatment.
- TDS meter (~$15) measures total dissolved solids, a rough hardness proxy — but it doesn't separate hardness from other minerals.
- Lab test — most water treatment companies in Codette Lake offer free in-home tests (expect a sales pitch); for an independent result, the EPA maintains a list of certified labs.
Note: the EPA doesn't regulate hardness (it's a nuisance, not a health hazard), but the EWG Tap Water Database tracks contaminants above health guidelines for Codette Lake's utility — see our Codette Lake water-quality report for what's actually been detected.
What about Codette Lake water quality?
Hardness is separate from safety. Codette Lake's water meets all Health Canada legal limits — 23 detected contaminants, none above the limit.
The ones people actually ask about:
Compare Codette Lake to Other Saskatchewan Cities
Other Very Hard Water Cities
Explore More
Frequently asked questions
Is Codette Lake water hard or soft?
Codette Lake, Saskatchewan water is very hard at 10.88 grains per gallon (186 ppm). That is considered hard enough to cause scale buildup and spotting.
How much does hard water cost the average Codette Lake household?
Based on the WQA-commissioned Battelle Memorial Institute study, hard water is estimated to cost the average affected household roughly $800/year in 2010 dollars (~$1,230 today after ~54% inflation) — an estimate, not a measured per-household figure. Scaled to Codette Lake's 10.88 GPG hardness, that works out to about $1,338/year (or ~$111.5/month) for a typical home — see the calculator on this page for the full breakdown.
Does Codette Lake need a water softener?
Yes — at 10.88 GPG, a whole-house water softener is the most effective way to prevent scale buildup, protect appliances, and reduce soap scum.
Why is Codette Lake's water hard?
Hardness comes from the geology of Codette Lake's water source. Codette Lake (North Saskatchewan River), SaskWater Codette Lake PWSS dissolves calcium and magnesium as water moves through the ground, and those dissolved minerals are what "hard water" means.
How do I test my water hardness in Codette Lake?
Use a home test kit (test strips for a quick read, or a TDS meter for dissolved solids), or check your utility's annual Consumer Confidence Report (CCR). For lab-accurate results, send a sample to a certified lab.
Who supplies Codette Lake's water?
Codette Lake water is supplied by SaskWater Codette Lake Potable Water Supply System. Its annual water quality report (Consumer Confidence Report) is the authoritative source for local hardness and contaminant levels.
What's the difference between grains per gallon and ppm?
1 GPG (grains per gallon) equals 17.1 ppm (mg/L). To convert: 10.88 GPG × 17.1 = ~186 ppm. Water is "hard" above roughly 7 GPG (120 ppm).
Sources & data
Hardness and water-quality data compiled from authoritative public sources.
- SaskWater Codette Lake Potable Water Supply System — primary hardness/water-quality source
- SaskWater Codette Lake Potable Water Supply System — annual water quality report (CCR)
- Health Canada — Guidelines for Canadian Drinking Water Quality
- Government of Canada — Water quality
- USGS — Water Hardness
- Water Quality Association — Scale & Hardness
- EPA — Drinking Water Regulations
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