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Water-risk intelligence · Greece

Know your water risk before you build.

Utilities are refusing connections and drought emergencies are spreading. We model a project's water demand against verified public data — and return clear, cited guidance.

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Municipalities
3
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20
Cited sources
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One dataset · five reports

Already constrained — in public

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  • Refused236.26m³/day

    Agios Nikolaos (Plaka)

    DEYAN (Agios Nikolaos)

    Refused 236.26 m³/day peak — 5-star resort, Plaka (April–October); sewerage connection also refused.

  • Emergency

    Faistos (Mesara)

    DEYA Faistos

    Water-shortage emergency in the Mesara; private-borehole water reportedly sells for €2–3/m³ (eKriti, 2 Oct 2025). Note: the Faneromeni reservoir figures (18M → ~3.86M m³, later dry) previously cited are NOT in this source and were removed.

  • Constrained

    Viannos

    Municipality of Viannos water service

    Chronic drought — Viannos is reported "thirsty even in winter," with the municipality pursuing a dam and three reservoirs (CretaLive, 13 May 2025). A pool ban (drinking water prohibited in pools, new or existing) is documented separately — reportedly a Dec 2024 municipal decree and Jan 2026 coverage — but that source URL is NOT yet catalogued and was NOT confirmed at the URL below.

  • Constrained

    Hersonissos

    DEYA Hersonissos

    High-density tourism corridor supplied in part from the Aposelemis reservoir (which serves Heraklion and neighbouring municipalities). Aposelemis fell to ~10% of reserves — 2,604,953 m³ (≈2.6M m³) as of 17 Oct 2025 — with roughly 100 days of reserve left; a historic low of 1.08M m³ was recorded in 2018.

  • Constrained

    Apokoronas

    DEYA Apokoronas

    Water shortages with hosepipe bans/use-restrictions under consideration. ⚠ The confirmed source is from July 2016 and predates the current 2024–26 drought cycle — cite with that caveat and refresh with a recent source. No building moratorium was found — do not assert one.

  • Constrained

    Archanes-Asterousia

    Municipality of Archanes-Asterousia water service

    Mayor's decision imposing water/irrigation-network restrictions: a ban on new irrigation connections, watering-hour limits, and possible periodic supply outages (Politica.gr, 3 May 2023). No quantified m³/day figures.

  • Constrained

    Gavdos

    Municipality of Gavdos water service

    Island supply crisis during the 2024 tourist season: the municipality issued an SOS/conservation appeal, warning it might have to proceed with water-supply cuts (News247, 16 Aug 2024). (A separately-reported contamination-linked gastroenteritis outbreak was not confirmed at this source and has been dropped.)

  • Constrained

    Attica (Athens metropolitan area)

    EYDAP (Athens Water Supply & Sewerage)

    Attica's reservoir system (Mornos, Evinos, Marathonas, Yliki) fell to ~520 million m³ — about half the 2022 level, ~2 years of supply. Hydrologists warn Attica (≈half of Greece's population) could face severe scarcity within ~4 years. (Search-level; verify on-page.)

Built on the public record

The moat isn't the calculator — it's the data. Every figure is cited and gated from seed to verified before it backs a paid report.

Verified over seed

17 / 20

Only human-checked figures back a paid report.

Official registries

Diavgeia + ΗΠΜ

DEYA decisions (with an ΑΔΑ) and environmental approvals from open-data portals.

Open dataset

greekwaterdata

The whole dataset is a standalone public repo the app consumes.

The EU precedent

Spain already gates this by law

Article 25.4, Spanish Water Law (RDL 1/2001) — mandatory pre-permit water-availability report

  • When a plan implies new water demand, the river-basin authority must state whether sufficient resources exist — before approval.
  • Effectively binding: a negative report renders the development materially unviable.
  • Default-to-negative: if the authority does not respond in time, the report is deemed unfavorable.
  • Enforced: >90 Spanish urban plans have been annulled by courts for failing to justify water availability.

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Based on publicly available secondary reporting and modelled coefficients, not official utility data feeds. A screening aid and guidance tool — not a guarantee of permit approval or water availability, and not a substitute for professional engineering, agronomy, or EIS review.