Good tasting water. 60 cents the gallon. Cool owner. hours may vary but I've been there earlier…read morethen 11am on a weekday.

Extremely nice. Been looking for alkaline water in San Francisco area, in Los Angeles so many…read morechoices. Awesome little spot, super nice. This is my go to spot now.

Looking for the best water in town, this is the place…read more Filtered to perfection, this water is sure to quench your thirst, and it's good for too. The owners are very knowledgeable of the health benefits their water offers. The service is superb, so be ready for a quick conversation whilst you fill your jugs! They also sell jugs that vary in size and they offer an outdoor dispenser when the store is closed. Ambience is great and you're sure to tap your feet to the groovy tunes that are always coming out the speakers. They have a lot of regulars because it's just that good! I give this place 4 yumms up and I'll be back for another refill soon!

"Now that's some high quality H20"…read more Great water and staff. Patrick is very knowledgeable -Nico

Water World has many five star reviews, and I'm sure it is deserved, but I won't be finding out if…read morethey can do better. Unfortunately, the boss forgot to schedule our first delivery and the staff forgot to inform me, resulting in them offering a delivery 4 days later. Apologies were offered, but the poor communication was not even an isolated incident as they have two different numbers, one for marketing and the other for management, and the latter blocks all incoming calls, asking to text the number instead. I've had serious issues with businesses not communicating in the past [See my PurCor pest control review] so my patience is fairly thin. I would go with two stars, but I was offered a discount on the order, and I felt that was one are they went above and beyond. A shame I lost faith in them.

Terrible service provided from beginning to end. Not reliable when it comes to redelivery. They…read moredon't hire employees, only gig part time workers who won't remember where to deliver each time and have horrible attitudes.

The owner is always professional and personable. I am handicapped and she most times helps me to my…read morecar with my containers of water. The water I obtain there is reverse osmosis, refreshing and from a trusted source. If ur lookin to buy a trusted source of pure water from a kind and friendly person who keeps her waterstore clean and in tiptop condition, I strongly suggest u visit Blue Sky Pure Water in Hayward.

I think the downside of this place is the owner. I can come at opening, closing, or even the middle…read moreof the day, and she won't be at the shop. A few times she caught me while I was leaving and walking back to my car because her shop was closed. She told me that I could always call her and she would come over from where ever she is. At that point though, she needs to realize that people will not be willing to just call her because they are not going to wait around for her to get back to her own shop when they need water and have their own schedules to follow. It's hard for me to write this because she is a very sweet and helpful lady, who will actually help you put water in your bottles and cap them for you. But because she consistently is not at her own shop when there are multiple people waiting outside, I think she has to change her ways before people stop coming to her shop. I think her shop is the best to buy water gear though. She has water jugs, water containers, and water stands, among other things that she sells. She also sells them at reasonable prices, some of them even better than the prices you can find online. We purchased all of the above mentioned things for our friends as their housewarming gift and they loved it. I like this store but I just wish she either was at her store more consistently or hired someone else to be there on time and/or until the store closes.

You won't find better tasting water than at this shop. They have 6 water stations inside so you can…read morefill up multiple bottles at the same time so you're in and out easy. They also have carts available to help you carry your bottles from the spout to your car. There's always parking and rarely a line. It's quick and easy. The owners are very nice and knowledgable. Support this local business and the environment and stay hydrated!

I go here to refill 5 gallon jugs for my office. The water tastes great, and I never have any…read moreissues. The man working the front is always courteous and the prices are very reasonable. I like that the parking lot is close to the front so I don't need lug the jugs too far.

So, its late November 2025. I see on the Castro Valley Vibe IG page about a promotion being…read moreoffered at the Castro Valley Water House for gallons of water. I'm thinking.. " I like water. I like to support my community." So I go in the beginning of December 2025, and talk to Eric I believe. I inquire about a membership and he's all jolly about it and said sure, let's do it. My gut told me, something was off by his reaction. Folks. Listen to your gut. I go a few weeks later in December during the hours of operation. Door is locked, but someone is in there. After a few minutes. They begrudgingly, let me in. I get my water and go. The next time I go to the Waterhouse, its about two days after New Years. There's a sign on the door saying. "Water House is no longer available at this address. If you have any questions or need water service. Please contact Water House directly. Thank you for your cooperation. " Mind you, there is zero contact information on the sign. Luckily, I grabbed a business card the first time I went to this business. So I email them. No response. Then I text the number with my concerns. The response is that they will Zelle or Venmo the money that is owed to me. I probably got about 10 to 12 gallons in total out of my membership. They tell me that they are waiting for the Attorney records and to get back their binder with the memberships and that if I know of any locations they can relocate, to let them know. I don't know any locations. They then tell me I should get a refund within a month. I wait a month and a half and text for updates. No response the first text. 2nd Text, they tell me that they are meeting with lawyer the next day and that soon after they would send me my refund via Zelle. Since that day in February, I've reached out every month since, and NO RESPONSE. Am I salty about it. Without a doubt. I'm sure I'm not the only one that is dealing with this. It's one thing to close down a business. But to then lead me on and say I will be getting a refund soon and then just stop responding. Not cool at all.

This place is always clean, and the customer service is outstanding. The owner is incredibly nice…read moreand friendly, which makes every visit a pleasant experience. The purified and alkaline water are the best around--so fresh and high quality. I also love that we can bring our bottles in, have them sanitized before refilling, and the prices are very reasonable. Highly recommend this place to anyone looking for great water and even better service! Attached is a picture of 5 of the 6 bottles that we have sterilized & refilled on a monthly basis.

It was my first time visiting, and the staff was incredibly friendly and welcoming! They didn't…read morepush anything on me and actually suggested I try the water first to make sure I like it before committing to any of their discount plans. The water is excellent quality, and the location on Alvarado Blvd is super convenient. Great customer service. I'll definitely be back to grab a plan!

Rude staff, I've always filled my water here at this location for the past 10 years or so. When I…read morereplaced my old bottles with new ones in the past it came with a free fillup at time of purchase, which was a nice touch. I tried explaining that to the lady in the front and she went ballistic, and started being belligerent.

I was in the area to eat at Cafe Noir across the street and stopped in to check out the salt water…read morefish here. The owner Kenny is super friendly and informative. I went in just to do some due diligence about fish and ask about pricing and upkeep. He showed me some tanks and the diverse aquatic life that is sold at his shop. He also informed me about how often a tank has to be cleaned and showed me a nifty magnetic glass cleaner that we definitely did not have when my dad kept a tank of fish in our house growing up. He does informative events at the shop and I will definitely keep my eye out for the next one. The director of the Cal Academy has done one where he discussed the giant aquarium and how it was built. Sounds really cool! This shop has sea horses and garden eels! It's a great place to go for aquatic needs and also for the events Kenny hosts.

First impressions is that this store is nice but many of the fish and other sea creatures looked…read moreunder stimulated with only PVC pipes to swim through. Several seem down right miserable.