Why do Egypt hotels smell bad in the evening (is the water safe)?

One theory (based on a Google search) is that the water used to irrigate hotel grounds in Egypt is recycled greywater from showers and sinks in the rooms; given how strong the smell can be, some guests suspect sewage water may also be mixed in. It's also noted that the treatment quality of this technical water varies between hotels — for example, the smell is weaker at Sigal than at Regina.

The evening water smell comes from non-potable technical water used for garden irrigation after 5pm — it's the same at every hotel regardless of star rating; the smell fades after sunset and is nearly gone by night.

For budget or mid-range hotels, don't expect 5-star service; check the room price on Booking beforehand so your expectations match what you'll actually get.

Small but annoying management issues happen even at pricier hotels: not enough sunbeds during peak season, cutlery/napkins not set out promptly in the dining area, no water cooler available — be prepared and don't expect perfection even at a higher price point.

One guest checked in and immediately noticed a strong water smell — their child refused to go outside, but the family took it calmly and with humor; it's not a critical issue.