Water with somebody's name against it.
A reservoir, a lagoon, a circuit, an intake, an outfall. Each of them turns up on a permit, in a maintenance budget and eventually in a shutdown log, usually belonging to the same person.
01 — Recreational and amenity water
An amenity lake fails in public.
Scum first. Odour a day behind it. Then a laminated notice on the jetty, generally during the fortnight the asset earns its year. There is no gradual phase to plan around.
Raw water reservoirs carry a heavier version of the same risk. When Lake Erie bloomed in 2014, roughly half a million people around Toledo were told to leave the tap alone for three days. Microcystin is the toxin behind advisories of that kind, and the WHO's provisional drinking-water guideline for it sits at one microgram per litre — a threshold low enough that a utility finds out it has a problem from a laboratory, not from the bank.
This is also the one duty where the published evidence lands squarely on target. NCCOS put an ozone nanobubble rig on an eight-acre Florida pond in 2018 and reported the algae gone within two days, oxygen restored, no visible harm to what lived there. Pond scale, though. Not a two-hundred-hectare reservoir, and we will not pretend the gap is small.
02 — Process and product water
What arrives at stage one prices every stage after it.
Beverage lines, food processing, wash-down and reclaim all inherit their raw water. A source that behaves in March and misbehaves in August does not create a treatment problem so much as a staffing one: somebody now watches it, adjusts it and explains it.
Our position in that picture is upstream of your train, not inside it. The reservoir, the balance tank, the holding lagoon, the reclaim circuit. Reducing the organic and microbial burden before it reaches the plant is a different lever from driving the plant harder, and on most sites it is the cheaper of the two.
No percentage is offered here. There is not an honest one to offer, because the answer moves with your source, your season and the equipment you already own. What is on the table is a before-and-after measurement on your water, against parameters fixed in advance.
03 — Cooling water and industrial loops
Biology is the expensive part of a loop.
Towers, condensers, power station circuits and data centre cooling all circulate water that is warm, well aerated and carrying enough nutrient to interest something. Which is why so much of a loop's running cost is biocide, dispersant, blowdown and the hours needed to keep all three in balance.
Oxygenation and controlled oxidation act on that biology rather than around it: dissolved oxygen lifted through the whole volume instead of the top of it, and the dissolved organic material biofilm builds from taken apart directly. The mechanism holds up. The transfer physics under it is published and not in dispute.
The number is where we stop. No chemical saving, no cycles gain, no make-up figure. A supplier quoting those before reading your make-up chemistry, your metallurgy and your existing programme is quoting somebody else's site back at you, and season two is where you find out whose.
One circuit. A fixed window. Your fouling indicators. That is the whole offer.
What a calibration run measures
Dissolved oxygen and temperature around the circuit, turbidity, organic load, and whichever fouling and heat-transfer indicators your team already trusts — logged on one schedule before, during and after, so the comparison is not a debate.
What it cannot settle
Anything about a different circuit, a different make-up source or a different season. Cooling water is site-specific to a degree that makes extrapolation close to worthless, which is the real reason this trade is littered with case studies nobody can repeat.
04 — Desalination intakes and discharges
The plant throttles before the bloom reaches the beach.
In the Gulf, desalination is not a convenience. World Bank reporting puts GCC states at nearly half of all desalinated water produced worldwide while holding under one per cent of global population, out of an industry running about 140 million cubic metres a day across 186 countries. Saudi Arabia's SWCC by itself accounts for roughly a fifth of world output. Foul an intake and what stops is drinking water.
The record is there if you look for it. Desalination trade press covering the 2008–09 Cochlodinium polykrikoides event describes five or more UAE plants taken down by membrane biofouling, some for as long as four months, one of them replacing its reverse-osmosis membranes outright — industry reporting rather than a regulator's file, so read it as indicative. Regional coverage of July 2023 describes a red tide significantly disrupting Barka's main plant in Oman, with Nama Water Services falling back on reserve wells, tying Sohar, Barka and Ghubra together and asking households to conserve. Also indicative, also not audited, and consistent with what the 2018 seaglider survey of the Gulf of Oman noted about blooms clogging intakes along that coast.
The outfall end carries its own exposure. Work published in 2019 estimated the world's plants discharge about 142 million cubic metres of brine daily, with Saudi Arabia, the UAE, Kuwait and Qatar between them responsible for 55 per cent of it — reported to us through secondary coverage, and treated accordingly.
Working the approach water is a separate discipline from working the plant. It happens outside the screens, in open water, on a body nobody can pipe anywhere. Which is precisely the case for a stage that moves.
Indicative sources for the event history above: WaterWorld on the 2008–09 UAE plant closures · Nama Water Services on Barka, via Muscat Daily · Queste et al. seaglider survey of the Gulf of Oman, 2018. All three are secondary reporting rather than regulatory records.
Falling unit cost is exactly why intake reliability now dominates the operating conversation. At half a dollar a cubic metre, producing the water is not the expensive part. Failing to produce it is.
Matching duty to water
Which mounting, and what it suits.
The stage does not change between these. What changes is how it reaches the water, how much of it you need, and which department on your site ends up owning the outcome.
| Mounting | Typical water | Who owns the problem |
|---|---|---|
| Skid | Cooling loops, balance tanks, reclaim circuits, process side-streams | Plant engineering or facilities, against a maintenance and chemical budget |
| Barge or pontoon | Amenity lakes, effluent and tailings lagoons, reservoirs, retention basins | Estate, environment or operations, against a permit and a closure risk |
| Vessel | Intake approaches, discharge fields, port basins, large open water bodies | Utility, port or ministry, against continuity of supply and a compliance file |
Vessel work at coastal scale runs on the SeaBreather platform, which carries this stage on a purpose-built hull. Where a harmful algal bloom is the specific driver, the system to ask about is HABslayer. Where the water is going onto a field, it is NanoponiX.
Your water, specifically
Which of these is yours?
Send the body or the circuit, what goes wrong, the months it happens in, and the cost of it happening. The reply is scoped to that asset and names the places treatment would make no measurable difference.