Your Guide to the Best Water Ionizers in 2024
Looking for the best water ionizer to keep you healthy, alert, and energized? There are so many water ionizer models and brands to consider that it can be challenging to identify the right one for you.
Whether you want healthier tap water that’s higher in alkaline, or you want to improve the taste of your water, a water ionizer can be the perfect solution for achieving both. With the right water ionizer, you will be able to enjoy silky-smooth, refreshing tap water enhanced with the healthy benefits of high alkaline levels.
Choosing between different brands of water ionizers can be frustrating if you don’t know what to look for. Use our guide of water ionizer reviews to find the brands, features, benefits, and pricing that’s right for you. Check out our chart for a quick peak of the top 9 water ionizers of 2024.
| Image | Product | |
|---|---|---|
 | Aqua Ionizer Deluxe 5.0 Water Ionizer
| VIEW PRICE |
 | Aqua Ionizer Deluxe 7.0 Water Ionizer
| VIEW PRICE |
 | Aqua Ionizer Deluxe 9.5 Anti-Oxidant Boost Water Ionizer
| VIEW PRICE |
 | Bawell Platinum Alkaline Water Ionizer Machine
| VIEW PRICE |
 | Water Ionizer Alkaline Machines and Water Purifier PH 3.5-10.5 Alkaline Acid Water Machine
| VIEW PRICE |
 | AquaGreen Alkaline Water Ionizer Machine AG7.0 Silver
| VIEW PRICE |
 | AlkaDrops Water Ionizer, Water Purifier Machine PH 3.5-10.5 Alkaline Acid Water Machine
| VIEW PRICE |
 | AQUALKA Water Ionizer & Purifier Machine AQU PH 3.5-10.5 Alkaline Acid
| VIEW PRICE |
 | Carrefy Home Water Ionizer, Water Filtration System Purifier, pH 3.5-10.5 Alkaline Water Machine
| VIEW PRICE |
Best Water Ionizers in 2024
Whether you want healthier drinking water or water with higher acidity for cleaning, this stylish water ionizer from Aqua is this year’s pick for the best overall water ionizer. Competitively priced and highly efficient, you’ll be amazed at the difference in taste and quality of your tap water.
Install the Aqua Ionizer 5.0 in only a few minutes using their illustrated, easy-to-follow instructions. Its compact design can be installed in your kitchen, bathroom or utility faucet for better tasting, healthier water you can taste almost immediately!
Active carbon filters in the Aqua Ionizer Deluxe 5.0 clean and purify up to 4000 liters of water, while the Ionizer unit produces pH 5.0 – 11 alkalinity. You can choose between 7 different water settings, offering varying levels of acidity or alkaline.
Key Features:
- 7 Water Settings
- Home Alkaline Water Filtration System
- Produces pH 5.0-11.0 Alkaline Water
- Up to -600mV ORP
- 4000 Liters Per Filter
- 110V
- Fully variable 4.5 to 11 pH
- Maximum -600mV ORP
Pros
- Improves Taste And Health of Water
- Noticeable difference in the taste and smoothness of the water
- Water can be used for a range of applications (drinking, cleaning, cooking, sterilization, etc)
- 7 Healthy Water Options
- 4 Ionized alkaline continuously variable
- 1 Non-ionized purified/2 ionized
- Advanced Electroplate Technology
- Platinum coated titanium
- Long-life
- Durable and energy-efficient
- Built-in Active Carbon Water Filter
- Long-life, premium grade filter purifies over 1,585 gallons
- Self-Cleaning
- Unit cleans itself by reversing polarity after each use and auto-plate washing itself
CONS
- Alkaline filter replacement is costly compared to other brands, but the Aqua Deluxe 5.0 only needs to be changed once annually
- Depending on the hardness level of your tap water, the unit will require descaling every 3, 6 or 12 months.
Another great ionizer from the same brand as our top pick the Aqua Ionizer Deluxe 7.0 features many of the same features as the Aqua 5.0. This is a countertop water ionizer, with a clean look to it.
The front-facing digital LCD interface is elegant and super user-friendly. All 7 water settings are easily marked, allowing you to choose between alkaline or acidity, as well as applications (ie drinking, coffee, household cleaning, cosmetics, etc)
You can literally have this unit connected and installed on your kitchen counter in 5 minutes.
Capable of producing slightly lower pH levels, this highly efficient ionizer both filters and ionizes your drinking water for a better tasting, healthier experience!
Best of all, the Aqua Ionizer 7.0 is self-cleaning, ensuring that your investment will go further. The unit uses reverse polarity to self clean after each use, and auto-plate washing every 10.5 gallons. That means fewer filter changes and less frequent descaling.
You’ll literally never need to buy filtered water or ionized water ever again. So, even with the cost of filter changes and the required maintenance, you can eliminate the need for bottled water, and enjoy great tasting water that’s also healthy!
If you’re looking to install the Aqua Ionizer Deluxe 7.0 under your kitchen sink you’ll need to get the adapter kit.
Key Features:
- 7 Water Settings
- Alkaline Water Filtration System
- Produces pH 4.5-11.0 Alkaline Water
- Up to -800mV ORP
- 4000 Liters Per Filter
- Fully variable 4.5 to 11 pH; OPR Range +600 to -750mV
- Intuitive backlit LCD
- 5 year warranty
Pros
- Improves Taste And Health of Water
- Noticeable difference in the taste and smoothness of the water
- Water can be used for a range of applications (drinking, cleaning, cooking, sterilization, etc)
- 7 Water Settings To Choose From
- 4 Ionized alkaline continuously variable
- 1 non-ionized purified
- 2 ionized acidic presets
- Advanced 7-Electroplate Technology
- 7 Platinum coated titanium plates
- Long-life
- Durable and energy-efficient
- Built-in Active Carbon Water Filter
- Long-lasting, high grade active carbon filter purifies over 1,585 gallons of water
- With lasts up to one year (depending on pollutant or hardness levels of your water)
- Self-Cleaning Unit
- Cleans itself by reversing polarity after each use
- Designed with automated plate washing every 10.5 gallons
Cons
- Although the Aqua 7.0 Deluxe uses FDA-grade plastic tubing, it isn’t BPA-free.
- Would be nice if this could be mounted undersink without the need for purchasing an additional adapter kit.
- This is a significant investment to make upfront, but worth it if you’re looking to save in the long-term.
If you’re looking for a boost of anti-oxidant to your water, the Aqua Ionizer Deluxe 9.5 was engineered just for that. This unit is made for countertops, but there is an adapter kit available for undercounter installations as well.
The sleek black design and LCD display follows the same design that Aqua Ionizers are known for. Adjusting pH levels and alkalinity are straightforward, with 4 alkaline, 2 acidic settings and one neutral pH setting for purified drinking water.
Installation takes about ten minutes, and the user manual shows you clearly how to select the water settings. FDA grade hose connections attaches to your water intake, and the unit serves as both purifier and ionizer. The active carbon filter lasts for 4000 liters before it needs changing (approximately once per year).
Thanks to proprietary antioxidant boost technology and the use of 9 plates, the increased hydrogen levels mean your ionized water will be fresher, purer and better tasting for longer. Store the water you need for later use or for immediate application in cooking, carpet cleaning, brewing coffee, and cosmetic cleaning.
Finally, you gotta really appreciate the self-cleaning feature that’s included as well. Less maintenance for you, less time spent descaling, and certainly less wear and tear on the filter as a result.
Key Features:
- Dimensions: 16.5 x 14.5 x 10.5 inches
- Weight: 13.8 pounds
- 7 Water Settings
- Alkaline Water Filtration System
- Produces pH 3.0-11.5 Alkaline Water
- Up to -880mV ORP
- 4000 Liters Per Filter
- Fully variable 3.0 to 11.5 pH
- OPR Range +600 to -880mV
- Intuitive Backlit LCD
- Lifetime Warranty
Pros
- High Antioxidants For Great Tasting Water
- Antioxidant Deluxe Machine uses proprietary antioxidant boost technology to dramatically increase levels of molecular hydrogen in your water
- Water remains in ionized state longer, can be stored and refrigerated for later use
- 7 Water Settings For A Variety of Needs
- 4 Ionized alkaline (continuously variable)
- 1 Non-ionized purified
- 2 Ionized acidic presets
- Advanced 9-Electroplate Technology
- 9 platinum coated titanium plates for boosted hydrogen levels
- Long-life (will function for years)
- Durable, energy-efficient plates
- Self-Cleaning
- Reverse polarity self-cleaning technology after each use
- Auto-plate washing every 10.5 gallons
Cons
- Haven’t found anything negative to report yet. We are always updating our reviews, however, so that could change.
The Bawell Water Ionizer Machine is a Filtration system and ionizer machine in one. You can use this device to enjoy the health benefits of alkaline ionized water for drinking and acidic water for cleaning.
Designed for countertop use only, the Bawell Alkaline Water Ionizer Machine is considerably more costly than the top 3 picks by Aqua. With many of the same features and ionizing capacity, you might be wondering why. It’s not a medical-grade device, and is made of the same materials as the Aqua water ionizers.
This Alkaline Water Machine connects to the faucet or water line below the sink. The Water Ionizer requires a minimum water pressure of 20 pounds per square inch of constant water pressure (20psi) supplied by tap or well water pressure. The company advises against connecting this unit to a well water source that fluctuates in pressure.
Interestingly enough, there’s also a 3-stage filter option you can use instead of the 2-stage filter, for added filtration power. The 3-stage filter is included as an option and can be very useful if your tap water needs to be purified as well as ionized.
One of the really cool features of this self-cleaning water ionizer is the voice alert that notifies you when the filters need changing. Other than that, it doesn’t offer any features that you can’t find in the Aqua water ionizers.
Key Features:
- Dimensions: 11.8 x 6.2 x 15.2 inches
- Weight: 11 pounds
- 7 Settings for water alkalinity, acidity or neutral pH
- Adjustable pH Range 2.0 – 12.0
- ORP Range +600 to -800
- Dual Filtration System for purifying your water
- Filter Replacement Every 5000 liters
- LCD Display
- Forever Lifetime Warranty
Pros
- DIY Installation
- Includes an instructional DVD and comes with all the necessary parts/attachments for a hassle-free connection
- Internal 2 Stage Water Filter System
- Produces clean, purified drinking water
- Filter Change required every 5000 liters (on average)
- LCD Display Provides Ease of Maintenance and Use
- PH & ORP, Filter 1 Lifespan, Filter 2 Lifespan, Alkaline Water or Acidic Water Electrolysis Settings are all visibly displayed
- Voice alert for filter changes
Cons
- Considerably more expensive than the top water ionizer brand
- Filter changes are costly and can be more frequent than annual, depending on your tap water and usage
- FDA-grade hoses used to connect the unit to your tap water are not BPA-free
- If you want to connect it below the sink, you’ll need to purchase a 1/4″ intake tube that connects to the bottom of the water ionizer through the countertop. Considering the price you pay, it would be nice if Bawell included the necessary hose as well.
The Webetop Water Ionizer is an alkaline machine for producing healthy drinking water rich in antioxidant levels. It is also a water purifier that can produce acid water for cleaning, cosmetics and other household uses.
Equipped with a high tech, active carbon filter, the Webetop Water Ionizer Alkaline Machine removes bad odors as well as chlorine, organic matter and other harmful contaminants lurking in your tap water. Even with daily use, you won’t need to change the filter for up to 6000 liters.
Five titanium plates with platinum coating work to achieve the alkaline and acidity levels you want, with a choice between seven settings. So whether you want an alkaline boosted cup of coffee, a smooth crisp glass of water to drink, or acidic water with a pH 3 level for your carpet cleaner vacuum, you’ll find a suitable setting.
Key Features:
- Dimensions: 15 x 6.6 x 6.5 inches
- Weight: 5.63 pounds
- 7 Adjustable Water Settings
- 5 Titanium platinum coated plates
- Up to -500mV ORP
- 6000 liters per Filter for fewer filter changes
- Auto-Cleaning (every 7.9 gallons)
Pros
- Adjust Alkalinity and Antioxidant levels easily
- Purifies as much as 6000 liters of water without the need for a filter change
- Extra large 3.8 inch colorful LCD screen display
- Imported IONIC MEMBRANE achieves higher efficiency electrolysis and longer working time
Cons
- Does not notify you when the filters need replacing, so you’ll need to keep track yourself. With daily use, the filter change should be annually, according to the manufacturer.
The AquaGreen Alkaline Water Ionizer is a Water Filtration System and countertop ionizer unit for Home. With its carbon water filter work you can get purified drinking water filter, while advanced electrolyte technology converts water into ionized alkaline and acidic water.
It’s capable of producing pH 3.5-10.5, and acid Alkaline Water up to -500mV ORP. The AquaGreen Water Ionizer is also equipped with five-plate, four-slot, precision sintered titanium white gold electrolytic board for great testing alkaline boosted water.
The large LCD display makes adjusting pH or alkalinity a breeze, with 7 settings for cooking, cleaning, drinking, hygiene, or sterilization, to name a few briefly.
With its 3-in-1 filtration and voice activated alert for filter changes, the AquaGreen is competitively priced and a worthy consideration for one of the best water ionizer units currently on the market.
Key Features:
- Dimensions: 13.6 x 10.8 x 6.7 inches
- Weight: 5.69 pounds
- 7 Water Settings (alkaline water 4 levels/Acidic water 2 levels/Purified water 1 level)
- PH Range:PH3.5-10.5
- ORP :+600 to -500mV
- TDS Range :50 to 1000PPM
- 3-in-1 Filtration System
- 5 Titanium White Gold Electrolytic Board
- Japan Coconut Shell Active Carbon Fiber Filter
- 3.8’ Inch LCD Touch Control Display
- 30-second Auto Cleaning
Pros
- Adjustable water settings for a range of uses (drinking or cleaning)
- Really improves the taste of your tap water
- Competitively priced with the best water ionizer brands
- Sleek and stylish countertop design
- Durable, quality filters require less frequent changes (every 6000 liters per filter)
- Auto-Cleaning in 30 seconds using reverse polarity technology
- Very effective at removing TDS impurities from your water (50 – 1200 ppm)
Cons
- FDA-grade plastic hoses are not BPA-free
- Filters need changing every 6 months, which can be costly
For those who value health as their top priority, the AlkaDrops Water Ionizer is worth looking into for a number of reasons. Packed with many of the same features you’ll find in the best water ionizer brands, this model was released late in December 2019, making it one of 2024’s newest options on the market.
Seven water settings, including a neutral pH setting for purified drinking water, and a 5 pc ABS+ titanium plate with platinum coatings gives the AlkaDrops a lot of versatility. You can use it to brew your coffee, or for a glass of drinking water rich with antioxidants and free of contaminants.
An active carbon filter takes care of treating your tap water before it enters the electrolysis unit. Thanks to the use of a Japanese imported Ionic membrane, the AlkaDrops Water Ionizer achieves higher efficiency electrolysis and a longer working time.
Use the large LCD touch screen to adjust the pH or alkaline settings, and monitor the status of the filters.
Key Features:
- Dimensions: 6.7 x 4.3 x 10.2 inches
- Weight: 5.77 pounds
- Up to -500mV ORP
- 6000 Liters Per Filter
- 7 Water Settings
- Auto-Cleaning
- Intelligent Voice
Pros
- 7 Adjustable pH and alkaline levels to choose from
- Connects easily to any standard kitchen faucet
- Produces filtered water, alkaline water and acid water for use in the home, personal hygiene, or cooking
- Self cleaning reduces need for frequent filter changes
- Long lasting filters
Cons
- Filter changes can be costly but necessary for optimal results
Priced lower than the top water ionizer brands, the Aqualka Water Ionizer is worth including in this review for its considerably high quality.
Although not as popular as some other brands, the Aqalka Water Ionizer & Purifier Machine achieves comparable pH levels, with a pH range of 3.5 -10.5 Alkaline Water. That’s enough to provide the seven water settings, similar to what you’ll find on the leading brands.
Designed with autoplate washing after every 7.9 gallons, this polished looking countertop ionizer also uses reverse polarity technology cleans the unit after each use, meaning less work for you. With a single carbon filter to change every 6000 liters, you’ll also have more time on your hands to drink that delicious alkaline water.
Perhaps the most impressive thing about this unit are the mounting options. Compared to more expensive brands, you can easily install the Aqualka Water Ionizer & Purifier on your countertop, mount it to the wall near the faucet in a kitchen, or in a utility room for cleaning water.
Key Features:
- Dimensions: 13.2 x 10.8 x 6.8 inches
- Weight: 5.5 pounds
- 7 Water Settings
- pH Range: 3.5-10.5
- ORP Range: 600 ~ – 500mV
- Advanced Electroplate Technology
- 5-pcs Large Size Titanium Plates with Platinum Coating
- Ionic Membrane (Japanese import)
- 3.8” Inch LCD Touch Control
- 6000L per Filter
- Auto-Cleaning
- Autoplate Cleaning
- Replaceable Active Carbon Filter Cartridge
Pros
- Elegant silver and black design suits any kitchen decor
- Flexible mounting options (counter or wall)
- Long lasting filters require changing annually
- Purifies water with high grade active carbon filter
- Ionic membrane improves electrolyte efficiency and extends the life of the unit
- Auto cleaning reduces need for frequent descaling
- Priced lower than leading brands and performs competitively
Cons
- May not be suitable for purifying water with significantly high contamination levels due to its single filter design. Most brands of water ionizers have at least a dual filtration system for purifying the water before it enters the ionizer unit.
Whether you want purified, alkaline boosted water, cleaning water for household chores, or better quality water for cooking, the Carrefy Home Ionizer was made for kitchens. It’s housed in an attractive design suitable for any kitchen decor, with a large front-facing LCD screen and touch screen controls.
Water ionizer and water filter in one, this unit works to first purify the water from your tap, then applies electrolysis to ionize the water. You can choose from among the seven settings for acidic water, alkaline water, or drinkable neutral water.
The range is not quite as broad as you’ll find in the best water ionizer brand, but the difference is quite negligible. You’ll find it is competitively priced with similar models by different brands, such as the Aqua Ionizer Deluxe line of water ionizers reviewed previously.
Overall, the Carrefy is very similar in design and functionality to the best water ionizers on the market. It’s priced slightly higher than the leading brands but achieves comparable results. If quality is your top priority and cost is not a significant factor, the difference in pricing may not be a concern.
Key Features:
- 7 Water Settings
- 5-pc Titanium Plates with Platinum Coating
- Ionic Membrane (Japanese import)
- LCD Touch Control
- Replaceable Active Carbon Filter (6000 Liters per Filter)
- Auto-Cleaning
- pH – Alkaline Range: 3.5 to 10.5
- +600 to -500mV ORP Level
- Large 3.8” inch LCD Screen
Pros
- Easy to install and operate
- Produces antioxidant alkaline, ionized water that is noticeably different in taste
- 5pcs large size Titanium with Platinum coating plates are high quality, durable, and long lasting
- Replaceable active carbon filter for purified drinking water right from your tap
- Treats water contaminated by bad odors, tastes, chlorine, organic matter and other pollutants commonly found in municipal or well sources
- Self cleaning technology every 7.9 gallons
Cons
- Slightly more expensive than leading brand of water ionizer but achieves comparable results and offers comparable features on par
Is Ionized Water Healthier Than Tap?
For the most part, the water provided by municipal water source is safe to drink, but it may not be the healthiest [1]. If you struggle with acidity in your diet or you’re seeking to increase your pH intake, ionized water is definitely a healthier alternative to tap water.
Water with a high pH level is either high in acid or alkaline [2]. Acid can be found naturally in water, or it can be chemically added. Public water systems and municipal water sources typically add alkaline to increase pH levels or neutralize them. Tap water usually measures a neutral 7, on a pH scale of 0 -14.
Balancing acidity levels (pH) in your diet is crucial to maintaining a healthy lifestyle. Excess acidity in your body can contribute to stress-related health issues. A pH level below 7 is considered acidic, meaning there is a high concentration of H + ions. These positively charged hydrogen ions can damage cell structure in humans, plants and animals [3].
To counter the damaging health effects of positively charged hydrogen ions present in water, pure hydrogen (H2) must be added to the water. Glacial water, as in the case of a stream, iceberg, or mineral water source, is naturally ionized water that contains high levels of antioxidant H2. It’s bluish appearance indicates the presence of healthy minerals, and you can taste the difference compared to tap water.
What Are The Health Benefits of Ionized Water?
1. IMPROVED HYDRATION: Staying hydrated is crucial to a healthy regimen of any kind. Ionized water can increase your ability to stay hydrated by helping your body absorb water more easily. Free of contaminants, the ionized water can be absorbed into your bloodstream pure and clean.
2. INCREASED VITALITY: The increased level of antioxidants in the water boosts your energy levels by stimulating your body with more oxygen. You’ll feel more alert and clear headed when it comes to handling a variety of tasks.
3. FIGHTS FREE RADICALS: Free radical can cause harm to the cells in your body, as well as proteins and DNA. Ionized water protects your healthy cells against damage from free radicals so you can consume ionized water safely.
4. DETOXIFICATION: Use a water ionizer to help cleanse your body of toxins that build up over time. Your bowel movements will appear darker and more odorous at first. With repeated use and a gradual increase in the amount you consume, you’ll start to feel lighter, less bloated and more energized.
5. REDUCED BODY ACIDITY: A buildup of acid in your body can lead to health issues if less untreated. Heartburn, indigestion, stress, cracked skin, and a host of other health issues can be significantly reduced by balancing your body’s pH levels. Drinking ionized water regularly can help you keep your pH levels balanced.
6. REPLENISHES ELECTROLYTES: Drinking ionized water charged with electrolytes can help replenish your body with vital minerals and electrolytes, particularly after a grueling workout or marathon.
How Does A Water Ionizer Work?
Another way to increase the pH level in your water is by means of a water ionizer. This simple electronic device separates tap water into alkaline water and acidic water. It increases the pH level in your water by applying controlled low voltage electrolysis directly to your tap water.
Here’s how a water ionizer works:
- A water ionizer filters and ionizes your tap water and is typically the size of your average toaster. They are designed to connect directly to your tap by means of a special attachment. The water is then redirected through a plastic hose into your ionizer unit.
- Inside the unit, the water is first filtered to remove contaminants and sediments. Once filtered, the water is moved from the filtering chamber to an electrolysis chamber with platinum-coated titanium electrodes.
- Positive ions are attracted to the negative electrode (anode), while the negative ions (anions) in the water are drawn to the positive electrode (cathode). Once separated, ionized water is directed back out of your tap for use in cooking or drinking. The oxidized water can then be directed into your sink and used for sterilization purposes
Alkaline Water Uses
A water ionizer isn’t just useful for producing healthy drinking water. It can also be used to produce acidic or alkaline water suitable for cleaning [4].
Just as ionized water removes harmful toxins from the body, it can also be used to neutralize and kill germs or bacteria on surfaces in your home. Simply saturating the area with alkaline water is all you need to clean and disinfect surfaces such as floors, countertops and even your carpeting.
- Minimum 2.5 pH level
- No chemical residue that could harm pets or small children
- Cleans carpets, furniture, and floors
- Disinfects and sanitizes by killing bacteria
How Long Does Water Stay Ionized?
Generally, it is recommended that you use ionized water immediately rather than store it for later use. Alkaline water or acidic water is a temporary state that is best used when it’s consumed immediately at the point of use.
You can store ionized water for the health benefits decrease over time. A water ionizer uses electrolysis to ionize your tap water, but the unstable ions do not remain charged forever. Over time, the hydroxyl ions dissipate within twenty four hours of being ionized. pH levels will return to their normal, neutralized state, while smaller clusters of ionized water molecules will dissipate within two to three months of being ionized.
- 18 – 24 hrs: Hydroxyl ions dissipate
- 1 -2 weeks: pH levels return to neutral (ie 7)
- 2 – 3 Months: Smaller ionized water molecule clusters dissipate
Is Ionized Water Safe To Drink?
- Children under the age of 3 should not drink alkaline water.
- Children between the ages of 4 years and 12 years should only drink alkaline water at Level 1 (one) or Level 2 (two).
- Do not drink ionized water 30 minutes before and up to 2 hours after taking medication. Ionized water has a faster absorption rate than filtered water, for instance. The absorption rate for your medication is calibrated specifically to achieve the desired health benefit. Consuming medication with alkalized water could render your medication ineffective or harmful.
- Avoid drinking alkalized water before or after your meals within 90 minutes – 120 minutes of consumption. Alkaline water is low in acidity, which the body needs to digest food.
Recommended pH Levels:
Drinking filtered alkaline water actually takes some getting used to. As toxins are expelled from your body, you may experience a range of flu-like symptoms, for instance. Runny nose, headache, fatigue, and muscle pain are all signs that the alkaline water is removing toxins that have been building up in your system.
When you initially begin using your water ionizer, start on the lowest setting while monitoring changes in your health. As your body adjusts to the increased alkalinity, you can then raise the setting.
- Below 7 pH: Acidic water (may also contain iron, copper, lead, zinc)
- 7 pH: neutral, pure water (no acid)
- 6.0 – 8.5 pH: Suitable for groundwater systems
- 6.5 – 8.5 pH: Suitable for surface water (ie rain water, tapwater)
