{"id":39646,"date":"2026-09-17T20:17:15","date_gmt":"2026-09-17T17:17:15","guid":{"rendered":"https:\/\/reoveemahutid.ee\/?p=39646"},"modified":"2026-09-17T20:22:44","modified_gmt":"2026-09-17T17:22:44","slug":"holding-tank-location-setbacks","status":"publish","type":"post","link":"https:\/\/reoveemahutid.ee\/en\/holding-tank-location-setbacks\/","title":{"rendered":"Where can a sewage holding tank go? Setbacks (kuja) from buildings, wells and boundaries"},"content":{"rendered":"

You have found a spot for the tank, but how far must it be from the house, the well and the neighbour’s fence? There is no single sewage holding tank setback Estonia-wide. The national regulation on setbacks (kuja<\/em>) does not cover sealed holding tanks (Estonian: reoveemahuti<\/em> or kogumismahuti<\/em>; UK readers may know one as a cesspool or cesspit). Your municipality may set a setback in its own wastewater rules, and those rules differ. This article explains who sets kuja<\/em> and how to find your municipality’s rule, then covers wells, boundaries and buildings, the manufacturer’s requirements, tanker access, and a checklist for the building notice (ehitusteatis<\/em>).<\/p>\n

What is kuja<\/em>, and who sets it for a holding tank?<\/h2>\n

A holding tank only stores wastewater until a tanker pumps it out: no treatment, no outlet. The Water Act (Veeseadus<\/em>) requires it to be leak-tight (\u00a7 124(2)). It is not a septic tank (septik<\/em>), which settles solids and needs an infiltration field.<\/p>\n

Kuja<\/em> is a setback. The Water Act defines it for sewerage facilities as their smallest permitted distance from homes, certain other buildings people use “and from a dug well and drilled well”. It is measured from the structure’s outer contour (\u00a7 134(1) and (4); the official English translation calls it “clearance”).<\/p>\n

The detailed distances are in Minister of the Environment Regulation No 31 of 31 July 2019, which covers treatment plants, pumping stations and tanker reception points. For small own treatment plants (omapuhasti<\/em>) it says: “the kuja<\/em> of a septic tank or other closed-top or underground own treatment plant is at least 5 m” (\u00a7 5(1) p 2, our translation; Estonian: \u201eseptiku v\u00f5i muu pealt kinnise v\u00f5i maa-aluse omapuhasti kuja on v\u00e4hemalt 5 m”<\/em>). The regulation never mentions holding tanks. Keskkonnaamet (the Environmental Board) states the consequence in its handbook for municipalities:<\/p>\n

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\u201eReovee kogumismahuti on reovee kohtk\u00e4itluss\u00fcsteem, mis ei kuulu m\u00e4\u00e4ruse nr 31 reguleerimisalasse. Reovee kogumismahuti kuja ulatuse n\u00f5ude v\u00f5ib kohalik omavalitsus kehtestada veeseaduse \u00a7 104 l\u00f5ike 7 alusel reovee kohtk\u00e4itluse ja \u00e4raveo eeskirjaga.”<\/em><\/p>\n

Our translation: “A wastewater holding tank is an on-site wastewater system that does not fall within the scope of Regulation No 31. The local authority may set a requirement for the extent of a holding tank’s kuja<\/em> under Water Act \u00a7 104(7) through its rules for on-site wastewater treatment and removal.”<\/p>\n<\/blockquote>\n

Water Act \u00a7 104(7) reads: “Local authorities shall establish rules for on-site treatment and transport of wastewater in their administrative jurisdiction”. That is the official English translation; only the Estonian text has legal force. Some municipalities set a holding-tank kuja<\/em> in those rules and some do not, and the figures differ. The Water Act’s zones around wells apply either way.<\/p>\n

How to find your municipality’s rule<\/h2>\n
    \n
  1. Title:<\/strong> usually Reovee kohtk\u00e4itluse ja \u00e4raveo eeskiri<\/em> (rules for on-site wastewater treatment and removal), sometimes with the municipality’s name added.<\/li>\n
  2. Search<\/strong> the official gazette, Riigi Teataja (riigiteataja.ee), for the title and your municipality. Municipal regulations have references starting “RT IV”.<\/li>\n
  3. Check<\/strong> the issuer (V\u00e4ljaandja<\/em>) and the status: hetkel kehtiv<\/em> (in force), not kehtetu<\/em> (repealed). Results mix both, and we found several repealed rules while researching this article.<\/li>\n
  4. Search the text<\/strong> for kogumismahuti<\/em>, kuja<\/em>, kaev<\/em> (well), hooldusala<\/em> (maintenance zone), naaberkinnistu<\/em> (neighbouring plot) and juurdep\u00e4\u00e4s<\/em> (access).<\/li>\n
  5. Ask<\/strong> the municipality in writing if the rule is silent or unclear. Municipal rules have no English translations.<\/li>\n<\/ol>\n

    Examples only \u2014 check your own municipality’s rule.<\/strong> Wording checked 17 September 2026. “Well zones” means the sanitary protection zone of a larger groundwater intake (10\u201350 m) and the maintenance zone of a dug well or small drilled well (10 m).<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n
    Municipality<\/th>\nLocation requirements for a holding tank (paraphrased)<\/th>\nRule in Riigi Teataja<\/th>\n<\/tr>\n<\/thead>\n
    Harku vald<\/td>\nNo distance. Must be possible to empty year-round, with access for the emptying vehicle, and placed to ease later connection to public sewerage.<\/td>\nRT IV, 07.10.2025, 49<\/a>, \u00a7 10(4)<\/td>\n<\/tr>\n
    Keila linn<\/td>\nOutside well zones and downslope of the well. At least 5 m from the neighbouring plot’s boundary; less if the neighbours agree.<\/td>\nRT IV, 20.06.2020, 51<\/a>, \u00a7 4(7)\u2013(8)<\/td>\n<\/tr>\n
    Kohila vald<\/td>\nAt least 2 m from the neighbouring plot unless agreed otherwise in writing with its owner. The site plan must show your well and any neighbours’ well zones reaching your plot.<\/td>\nRT IV, 05.05.2021, 5<\/a>, \u00a7 5(2), (4)<\/td>\n<\/tr>\n
    Saaremaa vald<\/td>\nOutside well zones. On-site facilities at least 10 m from a dwelling; a septic tank “or other closed-top tank” at least 5 m. The municipality’s web page<\/a> gives a holding tank a 5 m kuja<\/em> from its outer contour.<\/td>\nRT IV, 12.06.2019, 8<\/a>, \u00a7 4(6)<\/td>\n<\/tr>\n
    Saue vald<\/td>\nOutside well zones. Downslope of drinking-water wells and downstream of groundwater flow. No distance.<\/td>\nRT IV, 08.06.2018, 43<\/a>, \u00a7 4(4), (6)<\/td>\n<\/tr>\n
    T\u00f5rva vald<\/td>\nThe kuja<\/em> of septic and holding tanks is at least 5 m. Outside well zones.<\/td>\nRT IV, 12.06.2020, 17<\/a>, \u00a7 5(1)\u2013(2)<\/td>\n<\/tr>\n
    Viru-Nigula vald<\/td>\nThe tank’s kuja<\/em> must not reach into well zones. No figure for the kuja<\/em> itself.<\/td>\nRT IV, 29.01.2019, 23<\/a>, \u00a7 5(2)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

    Municipal rules are amended from time to time, so always open the version in force before you plan.<\/p>\n

    Wells, neighbours and buildings: what to check<\/h2>\n

    Wells<\/h3>\n

    The Water Act gives every dug well (salvkaev<\/em>), and every drilled well (puurkaev<\/em>) abstracting under 10 m\u00b3 a day, a 10 m maintenance zone<\/strong> (hooldusala<\/em>; “maintenance area” in the official translation). Inside it, “construction of a sewerage or wastewater collecting system” is prohibited (\u00a7 154(1), (3) and (5) p 7, official translation). Groundwater intakes abstracting 10 m\u00b3 a day or more have a sanitary protection zone (sanitaarkaitseala<\/em>) of 10, 30 or 50 m, depending on the intake’s size and how well the aquifer is protected (\u00a7 149(1)\u2013(2)). Five of the seven rules above keep holding tanks out of these zones.<\/p>\n