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Summary chapter

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There are probably an error in sludge destination (delta = 555.9 t DS/y)

Summary chapter for national stats

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2018

Croatia has 5.1% of its generated load compliant to the Urban Waste Water Treatment Directive (91/271/EEC).

In 2018, Croatia counted 260 agglomerations generating ≥2,000 p.e. each, of which:

  • 5 agglomerations, generating 255,360 p.e. of waste water, complied with the requirements of the Directive; and
  • 53 agglomerations, generating 3,400,364 p.e. of waste water, did not comply with the requirements of the Directive.
  • 202 agglomerations, generating 1,355,674 p.e. of waste water, did not relevant with the requirements of the Directive (probably because there are still under pending deadline).

The waste water load generated in Croatia in 2018 was reported to be 5,011,398 p.e.

In 2018, Croatia had not yet reached the target for collecting and treating waste water to fully comply with the Directive.

  • 10.6 % of the waste water load must still be collected (approximately 531,300 p.e.); and
  • 66.8% of the collected waste water load must still undergo secondary treatment in line with the requirements of the Directive (approximately 2,633,800 p.e.),
  • 88.8% of the collected waste water load from agglomerations generating >10,000 p.e. and discharging into sensitive areas must still undergo more stringent treatment in line with the requirements of the Directive (approximately 2,117,400 p.e.).

21.3% of waste water load is addressed by means of individual or other appropriate systems (IAS) i.e. non-centralised sanitation systems (approximately 1,066,500 p.e.).

For the 260 agglomerations, there are 196 urban waste water treatment plants, with a total design capacity of 4,117,000 p.e., of which:

  • 91 plants are active but not connected to collecting system,
  • 92 plants equipped with technology only for primary and secondary treatment,
  • 13 plants equipped with technology for more stringent treatment than secondary.

For the 196 urban waste water treatment plants, there are 91 discharges without treatment with a total load of 531,378 p.e.

Based on the 2018 data, it seems that the load generated is larger than the design capacity. [...]

Compliance rate by Article

Agglomeration Waste water load
Croatia in 2018 Total
[No]
Comply
[No]
Comply
[%]
Total
[p.e.]
Comply
[p.e.]
Comply
[%]
Article 3 (collection) 58 42 72.4 % 3,655,724 1,705,410 46.7 %
Article 4 (secondary treatment) 58* 8 13.8 % 3,045,172** 333,903 11 %
Article 5 (more stringent treatment) 42* 5 11.9 % 2,273,535** 177,598 7.8 %

Notice : This table contains only agglomerations with expired deadlines.

*The total [No of agglomerations] includes only those agglomerations that must provide secondary treatment / or more stringent treatment than secondary before discharging waste water from their treatment plants.

**The total [p.e. waste water load] is the sum of the load of all of the agglomerations that must provide secondary treatment or more stringent treatment than secondary before discharging waste water from their treatment plants.

Data source for table: Register, summary of MS data

16 agglomerations were not taken into account in the calculation of the compliance rate for Article 5 because these agglomerations generate ≤10,000 p.e. each.

Distance to target

Waste water load
Croatia in 2018 Target
[p.e.]
Distance to target
[p.e.]
Distance to target
[%]
Collection 5,011,398 531,345 10.6 %
Secondary treatment* 3,943,740 2,633,778 66.8 %
More stringent treatment** 2,384,834 2,117,439 88.8 %

*The target [p.e.] for secondary treatment represents the waste water load (collected and not collected) from all agglomerations that must be subject to secondary treatment, regardless of whether or not the agglomeration complies with Article 3.

** The target for more stringent treatment represents the waste water load (collected and not collected) from all agglomerations generating >10,000 p.e. and discharging into sensitive areas (regardless of whether or not the agglomeration complies with Article 3).

Data source for table: Register, summary of MS data

The expected annual investment costs per capita for installing and renewing waste water collecting systems and treatment plants is 105 EUR/inhabitant/year.

The investment needs for ensuring adequate urban waste water collection and treatment, i.e. compliance with the Directive, as estimated by the national authorities and included in their national plan, are at the level of EUR 3442.32 million for the period 2020-2028. This covers works on treatment plants, with the forecasted investment cost of EUR 957.24 million (2020-2028) , and works on collecting systems and/or IAS, with a forecasted investment cost of EUR 2485.08 million (2020-2027).However, as indicated in a recent OECD study, Croatia would need to increase their investments further to reach and maintain compliance. The OECD projected that the financing needs by 2030 (total cumulative additional expenditures for sanitation) is EUR 1.7 billion.

For the reference year 2018, Croatia reported the production of 6,338 tonnes of sludge. The sludge is mainly disposed for landfill (37 %) or re-used for others (36 %) and soil and agriculture (12 %).Data were not available for all WWTPs.

No information was reported on waste water reuse, storm water overflows by Croatia.