Key Points

St. Louis water is sourced primarily from the Missouri River and is classified as “moderately hard,” meaning it contains higher-than-average levels of calcium and magnesium.
According to the U.S. Geological Survey, hard water reduces water heater efficiency by up to 24% — meaning poor water quality directly increases your energy bills, not just your soap usage.
Six signs your home’s water quality needs attention: foul taste, cloudiness, mineral deposits, dry skin/hair, stiff laundry, and increased appliance wear.
Chlorine is added to disinfect St. Louis’s water supply and is safe at regulated levels, but its taste and smell lead many residents to filter it out for comfort.
Four common solutions address different water quality concerns: water softeners (hardness), whole-home filtration (chlorine/sediment), under-sink filters (drinking water taste), and reverse osmosis (comprehensive filtration).
A simple water test is the most reliable way to identify exactly which minerals or contaminants are present in your specific home’s water before choosing a system.
Contact Beis Plumbing to schedule a water quality consultation throughout the St. Louis area.

Have you ever noticed a funny taste or cloudy appearance in your tap water? Maybe you’ve seen white spots on your dishes or felt your skin dry out after a shower. These are all subtle signs that your water quality might not be as good as it should be. For St. Louis homeowners, understanding what’s in your water — and how to improve it — can make a big difference in your daily comfort and long-term health.

What’s in Saint Louis Water?

St. Louis draws most of its water from the Missouri River, and while it goes through rigorous treatment, it still contains minerals and trace chemicals that affect its quality. In fact, the city reports that our water is considered “moderately hard,” meaning it contains higher-than-average levels of calcium and magnesium. These minerals aren’t harmful to drink, but they can cause scale buildup in pipes and appliances, and reduce the effectiveness of soaps and detergents.

Chlorine is another common element in St. Louis water. It’s added to disinfect the supply, but it can leave an unpleasant taste or smell. While safe in regulated amounts, some residents choose to filter it out for peace of mind.

Understanding water hardness levels: Water hardness is typically measured in grains per gallon (GPG). Soft water falls below 1 GPG, moderately hard water (like much of St. Louis) typically ranges from 3.5 to 7 GPG, and hard water exceeds 7 GPG. Even at the “moderately hard” classification, the cumulative mineral exposure across daily showers, laundry loads, and dishwashing adds up — which is why many St. Louis homeowners notice the effects even though the water itself isn’t classified as severely hard.

Signs of Poor Water Quality at Home

Wondering if your home’s water needs a second look? Here are a few indicators:

Foul or chemical-like taste
Cloudy or discolored water
Mineral deposits on faucets or glassware
Dry skin and brittle hair after bathing
Laundry that feels stiff or fades quickly
Increased wear-and-tear on water-using appliances

If any of these sound familiar, your home may benefit from a filtration or softening system.

A closer look at the appliance wear-and-tear sign: This is often the most expensive consequence of poor water quality, even though it’s the least visible day-to-day. Mineral scale builds up gradually inside water heaters, dishwashers, washing machines, and coffee makers — reducing their efficiency and shortening their functional lifespan. Homeowners frequently address the appliance symptom (replacing a water heater, for example) without realizing the water quality itself was the underlying cause, which means the new appliance will eventually develop the same problem.

How to Improve Your Home’s Water Quality

Improving water quality doesn’t have to be complicated. Depending on your needs, there are several effective solutions:

Water softeners: Ideal for tackling hard water by removing excess calcium and magnesium. This helps prevent scale buildup and extends the life of your plumbing and appliances. Explore water softener installation for whole-home hardness treatment.
Whole-home filtration systems: These remove chlorine, sediment, and other contaminants before they reach your taps, improving taste and smell across every fixture. Learn more about whole house water filter installation.
Under-sink filters: A great solution for drinking water if you’re only concerned about taste or chlorine.
Reverse osmosis systems: These offer high-level filtration and are popular for homes where water quality is a major concern.

Choosing between these options depends on your primary concern:

If your main issue is hardness — scale buildup, soap that won’t lather, dry skin — a water softener is the most direct solution
If your main concern is taste, odor, or chlorine throughout the entire home, a whole-home filtration system addresses every tap, shower, and appliance at once
If you’re only concerned about drinking and cooking water, an under-sink filter is a more affordable, targeted option that doesn’t require treating your entire water supply
If you want the most comprehensive filtration available — removing a wide range of dissolved solids, not just hardness or chlorine — reverse osmosis delivers the highest level of purification, typically installed at point-of-use locations like the kitchen sink

Many homeowners benefit from combining solutions — for example, a whole-home softener paired with an under-sink reverse osmosis system for drinking water specifically. Our water treatment team can help you determine the right combination for your household’s needs and budget.

At Beis Plumbing, we’ve installed water treatment systems all across the St. Louis area — from newer homes in Chesterfield to century-old properties in Shaw. Every home is different, which is why we recommend a quick water test to identify exactly what you’re dealing with.

Why It Matters

Better water doesn’t just taste better — it protects your plumbing, helps your skin and hair feel healthier, and saves you money on soap, detergent, and appliance repairs. According to the U.S. Geological Survey, hard water reduces water heater efficiency by up to 24%, meaning poor water quality could be costing you more than you think (source).

Putting that 24% figure into perspective: Water heating typically accounts for a significant portion of a household’s energy bill. A 24% efficiency loss means your water heater is working substantially harder — and costing substantially more to operate — than it would with properly treated water. Over the lifespan of a water heater, that inefficiency adds up to hundreds of dollars in unnecessary energy costs, on top of the increased likelihood of needing earlier repair or replacement due to accelerated scale buildup inside the tank.

Key Takeaways

St. Louis water is moderately hard due to calcium and magnesium from its Missouri River source, and chlorine is added for disinfection — both contribute to common symptoms like scale buildup, dry skin, and reduced soap effectiveness. Six signs point to water quality issues: foul taste, cloudiness, mineral deposits, dry skin and hair, stiff laundry, and increased appliance wear. The USGS confirms hard water can reduce water heater efficiency by up to 24%, translating directly into higher energy bills. Solutions range from targeted (under-sink filters for drinking water) to comprehensive (whole-home filtration or water softening), with reverse osmosis offering the highest level of purification. A simple water test is the best starting point to identify exactly what’s in your home’s water before choosing a system. Contact Beis Plumbing to schedule a water quality consultation throughout the St. Louis area.

Let’s Improve Your Water—Together

If you’re unsure about the water quality in your St. Louis home, don’t wait for it to become a problem. Beis Plumbing can test your water, walk you through your options, and install the right system to meet your needs. From softeners to whole-home filters, we’ll make sure your family gets the clean, comfortable water you deserve.

Saint Louis Water Quality – What You Need to Know & How to Improve Your Home’s Water Quality

Table of Contents