Efficient & Effective Reverse Osmosis Drinking Water Systems Designed To Remove 99% of Water Contaminants

Backed by local, reliable, and professional installation and ongoing service. Get the highest quality drinking & cooking water available at an affordable price point!

Crystal Clear Ice Cubes

From Our Family To Yours…

Get Delicious, High-Quality Water On Demand for Drinking, Cooking, Pets, Plants, and Ice

Reverse osmosis under the sink water filtration systems keep you and your family healthy.

Five Star Reviews

Exceptional experience, cost was within the quoted range, workmanship was of high caliber & all interactions were highly professional with good personalization.

-Erik Chorazy, Mt. Angel, Oregon

Verified Customer

water splash

When it comes to water filtration, we know you’ve got plenty of options. From pitcher filters, refrigerator filters, and countertop systems to under-sink multi-stage reverse osmosis, there’s no lack of choices!

The question is, which is the best option for your home and water quality?

The first step is getting your water tested to understand better what’s in it. Not all filters remove all types of contaminants. In fact, there are many types of filters on the market for many types of water issues.

A free water test can typically provide the information you need to understand what type of filter is best. A more thorough analysis may be necessary if the basic test comes back with irregularities or high total dissolved solids that can’t be accounted for by common minerals such as calcium, or iron.

From there you can discuss with one of our water professionals which type of filtration will provide you with the highest amount of contaminant reduction in a cost-effective way for your budget.

To learn more about how we can help you get the right water filtration system the first time for the high-quality water you and your family deserve, contact us today at 503-436-6996 or fill out the contact form for a quick response.

    Select all that apply
  • We promise to never share, rent, or sell your information.
  • This field is for validation purposes and should be left unchanged.

Why Shiloh Water Systems Drinking Water Systems? Because We’re Different…

Who wants to wait for their water? Introducing revolutionary QuickFlo® Technology.

The K5 features QuickFlo® technology to deliver the ultimate in high quality water on demand. With a strong, steady stream of water, the K5 produces more water faster than any other comparable system so you won’t need to ration or wait for the water you need when you need it.

99 Percent Contaminant Reduction

We think the amount of contaminants in your water should be as close to zero as possible. Do you?

The K5 significantly reduces more contaminants than any other drinking water treatment unit. The K5 is certified by WQA to NSF/ANSI Standard 58 for PFOS/PFOA removal.

Customize Your Filtration

The K5 under-sink drinking water system is fully customizable for a unique water experience.

The thing about water is it’s as dynamic as you are. Now you can customize the FlexFilters in your K5 according to the specific water challenges you’re facing now or that you may encounter in the future. Learn more about the K5’s filter cartridge options.
great water solutions

You’ll love these features you won’t find anywhere else.

Additional features like the EverClean® Rinse to keep your membrane lasting a long time and the MACguard® Filter and PureMometer® Filter Life Indicator that lets you know when it’s time for filter changes will help keep your water pure and your system running at peak efficiency. Plus… quick-disconnect filter cartridges make changing filters a snap.

Ready to Get Started?

Fill out the form below or call 503-436-6996 for more information & a free quote!

    Select all that apply
  • We promise to never share, rent, or sell your information.
  • This field is for validation purposes and should be left unchanged.

Local Oregon Reviews

Patricia T.
Patricia T.
19:08 25 Feb 24
🙂🙂
Don K.
Don K.
19:18 24 Feb 24
I could not ask for better service. Fast efficient and exceedingly thorough. This is the second time I have needed service and Dante has exceeded my expectations again. Great guy and a pleasure to work with.
Tina W.
Tina W.
17:41 21 Feb 24
Rich is very kind and knowledgeable. He explains the process end what is being done. Very happy.
Σάρα Θ
Σάρα Θ
05:02 20 Feb 24
Shiloh Water Systems not only installed necessary filtration systems for our house and drinking water, they have excellent customer service, do maintenance and service calls and were able to troubleshoot a water pressure issue we had. We have lived... in our house for about a year and a half now and they were able to quickly ascertain the problem with the pressure tank and sensor, replace them, which completely fixed the issue. We are very happy with their service and highly recommend!read more
Claire J.
Claire J.
23:37 19 Feb 24
Eric was very professional and explained the system thoroughly. And gave some history of the three valleys.
breanne J.
breanne J.
22:24 18 Feb 24
Amazing company! The entire process was extremely seamless and professional. Eric was our technician and he made the entire experience quick and wonderful. He was kind, professional, efficient, knowledgable and experienced. I would highly recommend... Shiloh Water Systems to everyone.read more
Benjamin L.
Benjamin L.
18:26 15 Feb 24
Eric came out and taught me a bunch of information to me being a homeowner with no knowledge of water softening systems. Eric was quick and very professional with the tune-up Will definitely contact Shiloh with any future water softener issues.
Tina E.
Tina E.
23:19 12 Feb 24
Ridge was very nice, fast, helpful and professional!!
Lynda C.
Lynda C.
21:47 08 Feb 24
Dante was very conscientious & phoned to let me know when he’d be here.
Shannon B.
Shannon B.
03:26 08 Feb 24
Nathan called @ 1:00 to tell me he would be at my house in :45min, ( the time window they gave me when I scheduled was between 1 & 4) to let me know he’d be at my house in 45 mins, she remembered my Dogs from his last visit, he quickly got to work... he was very polite and personable. Took care of the annual maintenance, gave me my invoice I paid.read more
joanne I.
joanne I.
00:33 08 Feb 24
Showed up on an emergency call and then followed up to replace pump.
Dana L.
Dana L.
23:32 07 Feb 24
If you depend on Well-water for your home, you can depend on Shiloh to keep your systems running perfectly.
T K
T K
23:03 05 Feb 24
Tim did a great job checking the system and making sure I understood how to maintain my system, which we love.
Tee Zee A.
Tee Zee A.
21:41 01 Feb 24
Shiloh Water is the best. Super excellent customer service and quality water treatment products. Tim checked over our system from the well to the house after a freeze event and found the issue preventing us from accessing our water. He also helped... us understand how the system works and how to find more info about our well. Thank you Tim and other staff at Shiloh who helped schefule service as well!!read more
Jerry W.
Jerry W.
19:20 01 Feb 24
Did a great job very professional
Ken R.
Ken R.
23:06 29 Jan 24
Highly recommend these folks. Fast and honest service which got us up and running. Don't hesitate to call them.
Casey R.
Casey R.
22:29 27 Jan 24
Good work and fast. Excellent response time. Fixed same day.Maybe could have communicated betterI didn’t know it was already fixed!
Andrea M.
Andrea M.
23:04 25 Jan 24
Dante Bacas was on time, friendly, & knowledgeable.
Marilyn G.
Marilyn G.
22:16 24 Jan 24
EXTREMELY pleased..very knowledgeable in his field..easy to talk with..felt he was very honest...always answered all my questionsWould not hesitate to recommend him. I plan to continue using Ridge/ with Shiloh Mt. AngelNice to know there are... still people out there who take pride in their work.read more
Steve B.
Steve B.
20:34 23 Jan 24
Courteous , efficient and very informative!
Jenn H.
Jenn H.
00:32 23 Jan 24
Ryan was friendly, prompt, efficient and took care of our problem in record time. We are new customers for life!!
Karen M.
Karen M.
22:57 22 Jan 24
Being without water for almost a week, he came out when they could get trucks on the road. Added salt to the tank for me as well. Both guys were respectful and did a great job.
Dawn K.
Dawn K.
01:25 19 Jan 24
German came out last minute same day and got our water running again! Super friendly and fast! Thank you!
KJ
KJ
22:59 18 Jan 24
I have a well and have used Shiloh Water for any of my issues.They are very timely. And always fixed any problems that have occurred.Thank you!
randall M.
randall M.
22:50 18 Jan 24
Shiloh water systems rescued our house from a broken pipe at the wellhead. German came out and diagnosed and repaired the pipe in less than 60 minutes. He was also able to give me information about insulating the pipe that takes water to the house... and also purified water after he got done working with it. Very satisfied!read more
Matt L.
Matt L.
22:16 18 Jan 24
Service was prompt reasonably priced would highly recommend
Gretchen H.
Gretchen H.
21:30 18 Jan 24
Travis came to help us during the ice storm. He was polite, efficient, helpful and able to fix my problem. He explained the issue clearly and helped me understand my system better. I could not be happier. Thanks Travis and Shiloh Water Systems!
H D.
H D.
17:43 16 Jan 24
Eric came out the same day and quickly took care of my situation and explained things with tips. Shiloh is always friendly and professional.
JACK E.
JACK E.
23:03 12 Jan 24
Nathan, as usual, did a great job and was very professional and friendly.
Susan A.
Susan A.
21:11 12 Jan 24
Friendly service and on time. I will definitely be using your service for any other problems I may have. Thanks so much for your speedy service and friendly people
Gary F.
Gary F.
00:39 09 Jan 24
On time, great attitude. Workings with others from Shiloh Water Systems to fix my problem. Have done work for me before and I highly recommend Shiloh Water Systems. The technician Danta Bacas knows his job. Figured out the problem and had it fixed... in no time at all. He is a great person!read more
bob T.
bob T.
21:01 05 Jan 24
Donte is a great techLove my kinetic system
Brian & Nina W.
Brian & Nina W.
19:52 05 Jan 24
Shiloh once again took care of our well water needs quickly.
Nancy M.
Nancy M.
22:23 01 Jan 24
I was very impressed with Travis. He was knowledgeable and made sure I understood the equipment. His work was neat and completed in a timely manner. Very happy with my experience with Shiloh!
pamela W.
pamela W.
22:58 20 Dec 23
What happened? Eric was awesome. Great technician was on time. Did a great job of explaining what needed to be fixed and took care of it. In a timely manner. Very great experience from beginning to end. Thank you Ashley for your great customer... service on the phone as well.read more
Doug Y.
Doug Y.
21:14 20 Dec 23
I was able to get an appointment scheduled within a week of my call that worked with my schedule. Nathan, the technician who came to service our water softener was very knowledgeable, friendly and caring. He quickly diagnosed our problem and then... gave us the steps to take so we do not have this problem in the future.read more
Scott S.
Scott S.
17:05 14 Dec 23
I had a great experience with Shiloh Water. Best price and water quality is excellent.
Neil M.
Neil M.
04:34 14 Dec 23
Shiloh Water Systems responded quickly m, provided me with a complete solution offering the most reliable system components at fair pricing clearly and line itemized. Shiloh was easy to deal with and had no problems with me doing as much of the... work i was capable of. There service techs were courteous, timely, knowledgeable fast and very competent I highly recomend Shiloh Water System. Thank you to Mike, Travis and Ashleyread more
L C
L C
00:59 14 Dec 23
Ridge does a wonderful and thorough job. He also explains things well and is a kind and considerate person. Would definitely recommend.
Jodi H.
Jodi H.
22:56 13 Dec 23
Very knowledgeable staff. Highly helpful. Great service.
shane S.
shane S.
21:54 11 Dec 23
Have alway had a good experience with Shiloh servicing our water filtration system. We had a leak with our well pump and they came within a couple hours to take care of it. Thanks!
Esther K.
Esther K.
21:59 07 Dec 23
Prompt and efficient service.
Peter L.
Peter L.
20:02 30 Nov 23
Excellent, professional, on time service.
David M.
David M.
19:28 22 Nov 23
Visited Shiloh to find a filter for my whole house unit! They were kind and extremely helpful! Great folks!
Tintin50
Tintin50
01:12 14 Nov 23
Shiloh water Systems provided our home with skilled, speedy and reasonably priced service on our well. Our well pump was running constantly and after doing some investigating, I discovered a three inch nipple (galvanized), at the well head, that had... developed a crack. Called Shiloh at 2:30pm and they were able to have a technician at our home by 3:30pm. Dante had the leak repaired by 4:30pm and was headed back to the office. Thank you Shiloh Water Systems and thank you Dante.read more
Dan C.
Dan C.
23:23 13 Nov 23
Super helpful and very thorough. Definitely would use them again.
Shelly D.
Shelly D.
16:43 10 Nov 23
Travis was awesome 👍
Susan G.
Susan G.
02:26 10 Nov 23
Dante was awesome!! Polite, professional and knowledgeable.
Kirk H.
Kirk H.
00:19 04 Nov 23
Nathan was helpful, did a complete job quickly, and left our garage clean. He has been our contact with Shiloh for our last two visits. Thank You
Stephen L.
Stephen L.
21:12 30 Oct 23
Eric at Shiloh Water was professional, polite and was very neat. He explained what he was doing before starting and after he was done explained how the system worked in detail. Walked me through changing the cylinders for future replacement. I was... very pleased and would recommend Shiloh Water and Eric for your future water treatments.read more
Kim S.
Kim S.
18:26 30 Oct 23
Tim & his team mate did an excellent job installing our water softener and explaining everything to me afterwards.Thank you!
Burnie P.
Burnie P.
04:07 06 Oct 23
I woke up to no water from our well pump. Called Shiloh and on the same day they sent Eric to troubleshoot the problem. Eric determined the pump needed replacement. Eric explained the reasons for the replacement in a professional and courteous... manner. Two days later Eric and Daniel returned to install our new well pump system. Eric and Daniel have an excellent work ethic. They were very courteous and kind individuals. They answered all my questions and made sure I was pleased with everything before they left. A excellent company to work with an awesome staff. You can't go wrong calling Shiloh Water Systems!read more
Pamela G.
Pamela G.
13:05 06 Sep 23
Fast service. Very knowledgeable staff. Have had 3 well issues in the last 6 months. And a problem with our house water softening system. Fixed everything. Great job!
Lynn C.
Lynn C.
03:30 07 Apr 23
Eric came out to install a new system replacing my 23 yr old system. He was efficient, professional and made sure I understood all of the aspects of my new system. I highly recommend Shiloh Water Systems.
Kirk P.
Kirk P.
01:45 16 Dec 22
Fair and honest. Gets the job done.
Vanessa M.
Vanessa M.
16:54 29 Nov 22
Friendly with amazing service.
Erik C.
Erik C.
22:16 13 Sep 22
Exceptional experience, cost was within the quoted range, workmanship was of high caliber & all interactions were highly professional with good personalization.I will recommend Shiloh if ever asked about well R&R.
Fred B.
Fred B.
21:12 07 Sep 22
Ryan came out, tested the water, and diagnosed the problem that my water softener was experiencing. He arrived right on time and is friendly, courteous, and professional. I recommend this company.
Douglas W.
Douglas W.
21:59 20 Aug 22
As a remodeling contractor, we have used Shiloh Water Systems for many years to serve our customers. They have always done an excellent job and provided great products and service
Wes M.
Wes M.
01:59 09 Aug 22
We had Shiloh help replum our well water bladders a few years ago, so they were our first call when our water stopped this AM. Mike was incredibly helpful and patient, helping me debug the problem over the phone (through a few different phone... calls). Thanks Mike!!!read more
Grammie
Grammie
18:19 05 Oct 21
The estimate conducted professionally and efficiently.Prompt for appointment, great customer service by David and office.We are looking forward to continuing business with Shiloh.
Jonny G.
Jonny G.
23:34 26 Jun 21
These guys are top notch. We had no water and called two other companies and shilo called back and with 15 mins they were onsite. Turns out we needed a new well pump. Within 4 hours a new head and pipe were installed. They even brought out 500... gallons of water. We'll be calling them again next time for sure!!read more
Trent C.
Trent C.
16:19 26 Apr 21
We recently had our well pump fail. The Shilo crew came out the same day to diagnose the issue and replaced the pump the following day. I’m super happy with the workmanship and the service they provide!
Adriane M.
Adriane M.
19:04 10 Mar 21
We called to get a second opinion on work that needs to be done to our WS system. They let me know they can't do work in Washington (where we live) but still spent 40 minutes on the phone with me listening to what issues we are having and giving me... tips on what to look for and what to ask our local company.Heather took my call and was very helpful, she then had Nathan take over with the technical information and he guided me through things I can look at and what might be going wrong.Both were very professional and we really appreciated their help, especially as they put in the effort knowing they wouldn't be making any money off of repairs or replacements. They just took pride in helping someone.read more
Michael M.
Michael M.
16:05 11 Feb 21
Highly recommend Shiloh Water Systems. Nathan is incredibly professional and extremely knowledgeable with his product and the water in the surrounding areas. I highly recommend having them do a water test before you buy something that might not do... that job you want.read more
Alice D.
Alice D.
18:22 27 Aug 20
Can't say enough nice things about Shiloh Water. I am very pleased with the service and also theService tech that came . He was very knowledgeable and so pleasant to deal with. I wouldn't hesitate a second to recommend Shiloh Water to anyone. ... Thanks again!read more
Rye Z.
Rye Z.
23:22 17 Aug 20
I can't recommend these guys enough. I have met very few construction or service businesses who are willing to cater to my OCD and exceptionally high expectations the way Shiloh did.Additionally, I have a very unconventional work schedule, and... Nathan was willing to accommodate by taking calls on nights and weekends to answer the many questions I had.Install was clean and top notch as promised.read more
Patrick L.
Patrick L.
02:35 02 Jul 20
Yesterday we had the exciting experience of having our well water system stop working unexpectedly in the middle of the day. Nathan and the Shilo team got right on it, they had Dante out within 2 hours, did the repairs for a very reasonable price,... tuned up our system, and educated us on some things we did not know about our system. Absolutely a perfect experience all the way through. Thanks to Nathan, Dante and the Shilo team for their excellent service!read more
L L
L L
20:52 28 May 20
With this pandemic going on, I wanna truly thank Nathan for bringing over tha filters for our water system, the video he told me about was perfect & my wife LOVES it ... he went above & beyond thank you again from our family.
Brian P.
Brian P.
15:27 25 Apr 20
I thought I had left a review for Shiloh Water before, but was AGAIN compelled to say what great service. End of day Friday, I called for some replacement filters as i wanted to change out ASAP and Wilson was super helpful over the phone and on top... of that met me after work for filter pickup - That Is Good Customer Service! Thank Youread more
Quarter M.
Quarter M.
03:11 01 Apr 20
Thank you for being there for me and my family. We had a break in the main line coming in to the pump house and two residences were out of water. It took a complete over haul of the system but you folks made time for us and Travis did a great job,... even staying late to get the system up and running. The bill I got was very reasonable and there were no hidden charges. You are the only ones that will work on my system. Thanks again.read more
Don S.
Don S.
21:25 31 Oct 19
Nathan and his entire family provide extraordinary education and healthy water products. I’m so grateful they analyzed our water, solve the issues with sulfur, and did so much more to make certain we are healthy. I love Nathan’s reminder: Use a... filter, don’t BE a filter.When our pump failed, and our well needed a great deal of rehab, it never occurred to me they could do that too. It’s all done, it’s awesome. Again, thank you, all of you! You run a spectacular business.read more
Daniel B.
Daniel B.
01:07 01 Jun 19
When we were selling one of our rentals we discovered that our well was over acceptable limits of arsenic. Ryan came out did a water test and shared his knowledge in regards to Water Systems that would take care of our our issue... it seemed like it... was going to be a very costly system.... he called me an hour later (after conferring with his associates )and recommended a far less costly system that did the job in spades. Moral of the story, Ryan brought honesty, integrity, and all the knowledge base of Shiloh water systems. A team player!Couldn't be happier with the customer service and install.... would highly recommend for all your water projects!read more
Debbie S.
Debbie S.
17:07 23 May 19
I have a new home with well water. I knew before construction that there was iron in the water. As we all know heavy metals can cause cancer so it was very important to me to have the water cleaned up.Nathan came and tested the water and... recommended a treatment system. After installation my water is clean, tasty and healthy. No longer does the iron stain toilets, sinks or laundry.I think of Shilo Water with every glass I drink!read more
Warner S.
Warner S.
19:41 30 Apr 19
We had our Kinetico water system installed last October and couldn't be happier. We moved into our new house and then noticed that the water was staining appliances and had an awful smell. We were worried about the cost of the Kinetico system,... but we went ahead with it. I could not be happier, this was one of the best investments that I have ever made. Ryan just came out and did our first check up, and was great. He walked me through the steps of cleaning my filter, and the tailored my maintenance schedule to our well's unique needs. I hope I don't get him in trouble, but there wasn't even any charge for the call!I recommend anyone buying a house to schedule a visit before you close on the house, as my only regret is that I didn't bundle the investment into my mortgage...read more
Next Reviews
js_loader

Local Info

Mt. Angel Reverse Osmosis

Reverse Osmosis Mt. Angel

Throughout your home and throughout your life, a Brita® PRO Mt. Angel Reverse Osmosis from Shiloh Water Systems can improve the quality & taste of your drinking & cooking water. Whether you live in an area known for water contamination or some other concern, we have the solution for your Mt. Angel home.

Diagram, desalination, water treatment, water filter, membrane, process, water purification, system, industrial, seawater, 5 stage, simple, home, commercial, installation, whole house, diy, drinking water, countertop, plant, flow, under sink, pressure, pump, schematic, filtration, water softener, 6 stage, connection, apec


190 West Church Street PO Box 257 Mt. Angel OR 97362
Phone Number: 503-436-6996
Hours: 8:00am - 5:00pm Mon - Fri

About Mt. Angel OR:

Directions:

Reverse Osmosis System Reviews:

See why we are the top reverse osmosis water filter provider in Mt. Angel
Google Reviews:
Facebook Reviews: https://www.facebook.com/shilohwater/reviews
Yelp Reviews: https://www.yelp.com/biz/shiloh-water-systems-mount-angel-2
Angie’s List: https://www.angi.com/companylist/us/or/junction-city/shiloh-water-systems-reviews-10126635.htm
Home Advisor: https://www.angi.com/companylist/us/or/junction-city/shiloh-water-systems-reviews-10126635.htm
BBB Reviews: https://www.bbb.org/us/or/mount-angel/profile/water-purification-equipment/shiloh-water-systems-inc-1296-22028795

You may have found us by searching for some other common water services:

Water Filter Supplier Mt. Angel OR

Water Purification Company Mt. Angel OR

Water Softening Equipment Supplier Mt. Angel OR

Water Testing Service Mt. Angel OR

Some of our other important water services pages:</strong

Water Treatment Mt. Angel OR

Mt. Angel Water Filter

Mt. Angel Reverse Osmosis

Mt. Angel Drinking Water

Water Softener Mt. Angel

Water Testing Mt. Angel

Counties in/near Mt. Angel:
Marion County, Clackamas County, Polk County, Yamhill County, Linn County, Washington County, & Multnomah County

Cities in/near Mt. Angel:
Corvallis, Hubbard, Junction City, Turner, Beavercreek, Woodburn, Pleasant Hill, Gresham, Canby, Saint Paul, Springfield, Troutdale, Lake Oswego, Salem, Veneta, Dallas, Molalla, Keizer, Albany, Independence, Mulino, Aumsville, Brownsville, Monmouth, Oregon City, Jefferson, Lebanon, Beaverton, West Linn, Mount Angel, Lyons, Tualatin, Wilsonville, Scotts Mills, Mill City, Sherwood, Portland, Silverton, Scio, Amity, Eugene, Stayton, Tangent, McMinnville, Cottage Grove, Sublimity, Harrisburg, Newberg, Aurora, & Sheridan

Zip Codes in/near Mt. Angel:

Neighborhoods in/near Mt. Angel:

Frequently Asked Reverse Osmosis Questions:

What is reverse osmosis?

Reverse Osmosis (RO) is a water purification process that uses a partially permeable membrane to remove unwanted molecules and particles from drinking water.

What does reverse osmosis remove?

Reverse Osmosis removes common chemical contaminants such as:

  • sodium
  • chloride
  • copper
  • chromium
  • lead

Some systems may also reduce:

  • arsenic
  • fluoride
  • radium
  • sulfate
  • calcium
  • magnesium
  • potassium
  • nitrate
  • phosphorous

How much is reverse osmosis system?

A Reverse Osmosis System cost depends on the type of system you’re looking to purchase. Under sink reverse osmosis systems range from $250 to $7,500. Whole house reverse osmosis systems range from $1,000 – $18,000. System costs depend on a number of factors but are most closely tied to the amount of water that needs to be filtered per day.

How to remineralize water after reverse osmosis?

You can remineralize water after reverse osmosis filtering through various methods. Most modern reverse osmosis systems include a remineralization tank that takes care of adding minerals back into your water for you.

How to make reverse osmosis water alkaline?

You can make reverse osmosis water alkaline by adding alkaline minerals and raising the ph of your filtered water.

What is not removed by reverse osmosis?

What is not removed by reverse osmosis may surprise some. While RO filters will reduce a wide range of contaminants from your water, it will not remove some pesticides, solvents, volatile organic chemicals VOCs (like chlorine and radon), dissolved gases (ammonia, carbon dioxide, oxygen, hydrogen sulfide), and organic contaminants (such as formaldehyde, methanol, acetonitrile, methyl ethyl ketone, etc.).

How much water does reverse osmosis waste?

Reverse osmosis wastes on average about 4 gallons of water per gallon made. If you use 3 gallons a day for drinking, cooking and internal consumption, that means you will waste about 12 gallons, making a reverse osmosis system about 25% efficient. Comparatively, a washing machine and dishwasher use electricity and hot water (which takes energy to heat) and waste every gallon of water they use.