Coastal communities
The bathing beaches, the drinking-water intake, the landing quay, the summer season and the value of every address within sight of the shore. A coastal authority owns all of it. A bloom that runs for six weeks can take a decade to pay off.
The civic case
Ask a finance director what the bay is worth and you get a pause, then a guess. The bay has never invoiced anybody. It has no maintenance schedule, no depreciation, no asset number, and no officer whose job title contains it.
Then it fails, and everything invoices at once. Emergency sampling. Signage and cordons. Extra refuse collection for what washes up. A press office working weekends. Environmental health officers pulled off routine inspection. Legal time spent on who is liable for the shellfish. A harbour that lands nothing for a fortnight in the only month that pays for the year.
Those are the costs that appear. The ones that do not appear are larger: the bookings not made, the conference not rebid, the second home sold at a discount to a buyer who read the news, the young skipper who takes a job inland and does not come back. None of that arrives as an invoice. All of it arrives.
This site is about that second ledger. It is written for the people who have to answer for it in a chamber, on local radio, and at the next election — not for the engineers who will eventually be asked to do something about it.
The exposed assets
Each has a documented failure record. None of the figures below are ours; every one comes from a fisheries agency, a health authority or a peer-reviewed study, and every one is linked.
Red tide was already taking money out of Florida's Gulf coast tourism economy fifty years ago. NOAA Fisheries puts those losses at about $107 million in 1971 and $71 million in 1974. Half a century of monitoring, forecasting and public communication later, the same organism still closes the same beaches — which tells you how much of this problem is solved by information alone.
In August 2014 a bloom on Lake Erie put microcystin through Toledo's drinking-water intake and roughly half a million people were told to stop drinking from the mains for three days. WHO's provisional lifetime guideline for that toxin in drinking water is one microgram per litre. A city does not get to negotiate that number down on the morning it is exceeded.
The Maryland bloom of 1998 removed $81 million of seafood sales. Further south, NOAA's coastal science programme values Gulf commercial fishing at roughly a billion dollars a year and identifies hypoxia among the conditions degrading the habitat behind it. A fleet does not announce that it has stopped being viable. It shrinks by one boat a year until the ice plant closes.
Sources: NOAA Fisheries, economic impacts of harmful algal blooms · NOAA NCCOS hypoxia programme · WHO microcystin background document.
The fourth is the one nobody photographs. Shoreline property and the seagrass in front of it both adjust slowly, in the same direction, and neither shows up in a season's accounts. That belongs in the ten-year view
Public health
A directorate of public health does not close a beach because the water looks wrong. It closes because of what one named compound does to one named person, and because the alternative is explaining afterwards why it did not.
These three account for most closure decisions on temperate and subtropical coasts. They behave differently, they reach people by different routes, and they shut different things down.
| Toxin | How it reaches people | What it does | What closes |
|---|---|---|---|
| Brevetoxin | Aerosol off the surf during Karenia brevis red tide — no contact with the water required | Coughing, sneezing and airway irritation. In asthmatic study subjects, symptoms have been reported lasting up to at least five days after a single hour of exposure, and coastal emergency admissions for asthma, pneumonia and bronchitis rise during active blooms | The beach, the seafront terrace, the charter boat, the school trip |
| Domoic acid | Shellfish that have fed on a Pseudo-nitzschia bloom | Amnesic shellfish poisoning: vomiting, diarrhoea, headache and disorientation at low dose; seizures, coma, permanent short-term memory loss and death at higher dose. California's health department names older people, people with kidney disease or diabetes, pregnant women, infants and children as the groups at greater risk of severe illness. There is no specific treatment, and cooking or freezing does not destroy it | The commercial harvest and the recreational dig, often for months |
| Microcystin | Freshwater cyanobacteria drawn through a drinking-water intake, or swallowed while swimming | Liver damage and gastrointestinal illness. WHO's provisional lifetime drinking-water guideline is 1 microgram per litre, with a separate short-term value of 12 for the fortnight a utility spends getting treatment back under control | The mains supply, and every institution that depends on it |
Health effects summarised from California Department of Public Health, peer-reviewed respiratory toxicology literature and the WHO microcystin background document.
The arithmetic
There is no reliable annual figure for any of this, and you should be suspicious of anyone who quotes you one. What exists is a list. NOAA Fisheries keeps a public tally of individual events with a cost attached, running back to a Florida red tide in 1971, and that list is the closest thing to a national account anybody has. Taken one entry at a time it reads as survivable. Taken as a recurring charge against a single stretch of coast, with the same fortnight lost most years, it reads differently.
Reputation is the part no model handles well. A place that closed its beaches in three of the last five Augusts is not carrying a water problem. It is carrying a market problem, and the market corrects slowly. Tour operators plan two seasons ahead. Conference bureaux plan four. Families choose on what they remember.
The decade view is where the case for spending anything at all becomes obvious, and it is the view almost nobody builds, because no single budget line owns it.
Scope, stated up front
An authority that buys in-water remediation on the wrong understanding will be disappointed in public, and will say so in public. So these come before the case, not after it.
Accountability
Somewhere in the second month of any programme, a member is asked a version of this at a public meeting: how would we know if it were doing harm? It is a fair question, asked in good faith, and it decides whether a programme survives its first unfriendly headline.
Which is why every programme is designed with independent scientific oversight running the whole length of it. Alarivean asks that the local institutions be involved from the outset — the university marine department, the regional laboratory, the estuary or catchment body — and hands them the same live water-quality feeds the vessels are working from. Not a report. The feeds. They are free to put their own instruments in the water beside ours and to keep everything those record.
Insisting on that rather than merely allowing it is partly self-interested, and worth admitting. An authority that can name an independent body with continuous access has an answer that does not rest on trusting a supplier. The supplier gets a result that does not rest on being trusted. Both of those are worth more than they cost.
It also outlasts individuals, which matters more in local government than anywhere else. Officers move on. Cabinets turn over. The contract manager who understood the arrangement retires in March. An institution with its own copy of the record and its own standing in the town is still there.
Who does the work
Alarivean, Inc. runs coastal remediation as a service: vessels in your water for a contracted season, carrying oxygenation and controlled oxidation to where the deficit actually sits.
For an authority the practical shape is a service zone rather than a capital project. No hull to buy, no gas contract to run, no argument about which department owns a boat. The vessels are SeaBreathers; the treatment stage is Nano Bubble Oxidation Technology; the programme is scoped after somebody has read your own water, not before.
What we ask for first is not a specification. It is a description — the water body, the stressor, the months it happens in, what the last bad season cost, and whatever you have already tried. Ten minutes of writing, sent through Alarivean's contact form. Everything after that is a conversation about your own data.
Immediate, Significant, Scaled
Send the water body, the stressor, the season and what the last bad year cost the community. Alarivean answers with a site-specific read on what a programme would change on that water, and what it would leave untouched.