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Compliance of water to regulations

TESTATA Compliance of water to regulations

Compliance of water to regulations

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In this report:

Water Conformity Law

In addition to analytical results expressed as average concentrations, the following chart shows the percentage of analyses performed by Hera and by local health authorities in 2020 that produced results that are compliant with the limits set by Italian Legislative Decree 31/2001.

This percentage differs from the performance indicators defined by Arera Resolution 917/2017 for the regulation of the technical quality of water services. The "rate of parameters from non-compliant internal checks" (indicator M3c required by resolution 917/2017) is calculated on all samples and all the parameters sampled by the internal checks required by art. 7 of Legislative Decree 31/2001 and therefore concerns all the parameters in tables A, B, and C of Legislative Decree 31/2001. On the other hand, the "percentage of analyses compliant with limits" indicator shown in this report considers the 22 parameters considered most significant for assessing the quality of the water distributed by Hera.

With regard to the parameters listed in the above chart, in 2020 Hera and local health authorities carried out 230,430 analyses along the distribution network in the regional environmental protection agency labs: overall, 99.9% of analyses were within regulations (as per Italian Legislative Decree 31/2001). The cases of non-compliance mainly concerned aluminium (in Bologna area), chlorite (in Ravenna area) and iron (in Forlì-Cesena area) - which the regulation classifies as indicator parameters, - and trihalomethanes total (in Pesaro-Urbino area).

Water quality: % of analyses compliant with the law (2020)
Analyses performed by the Group and by public control bodies1

  BOLOGNA AREA .ERRARA AREA FORLÌ-CESENA AREA MODENA AREA PADOVA AREA PESARO-URBINO AREA RAVENNA AREA RIMINI
AREA
TRIESTE AREA
Aluminium 98.2% 100.0% 100.0% 100.0% 100.0% 99.9% 99.9% 100.0% 100.0%
Ammonium 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Pesticides 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Total pesticides 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Arsenic 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Cadmium 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Chlorite 99.9% 99.9% 99.9% 100.0% 100.0% 100.0% 98.8% 100.0% 100.0%
Chloride 100.0% 100.0% 100.0% 100.0% 100.0% 99.8% 100.0% 100.0% 100.0%
Hydrogen ion concentration 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Conductivity 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Escherichia coli 99.8% 99.9% 99.9% 99.8% 100.0% 99.6% 100.0% 99.8% 100.0%
Iron 99.3% 99.8% 99.9% 99.0% 100.0% 98.8% 99.3% 99.8% 100.0%
Fluoride 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Manganese 99.5% 100.0% 99.9% 100.0% 100.0% 99.7% 100.0% 99.4% 100.0%
Nitrate 100.0% 100.0% 100.0% 99.9% 100.0% 100.0% 100.0% 100.0% 100.0%
Nitrite 99.9% 100.0% 100.0% 100.0% 99.7% 100.0% 100.0% 100.0% 100.0%
Lead 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Dry residue at 180° 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Sodium 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Sulphate 100.0% 100.0% 100.0% 100.0% 100.0% 99.9% 100.0% 100.0% 100.0%
Tetrachoroethylene + Trichloroethylene 99.8% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Trihalomethanes-Total 100.0% 100.0% 99.7% 100.0% 100.0% 98.8% 100.0% 100.0% 100.0%
TOTAL 99.9% 100.0% 100.0% 100.0% 100.0% 99.8% 100.0% 100.0% 100.0%

Note: Italian Legislative Decree 31/2001 classifies aluminium, ammonium, hydrogen ion concentration (pH), chloride, iron, manganese, and sodium as “indicator parameters”. For dry residue at 180°, Legislative Decree 31/2001 specifies recommended values.
1 Data relative to Emilia Romagna was collected by Arpae for USLs, while readings for Padua and Trieste were taken by Padua ULSS and Trieste ASUI respectively. ASUR Marche provided the readings for the area of Pesaro Urbino.

The Legislative Decree 31/2001 and regional regulation 9/2004 identify non-conformity action plans that differ depending on whether the parameters only alter organoleptic qualities of the water - as with iron and manganese (classified by Italian legislative Decree 31/2001 as indicator parameters) - or whether they alter drinking water - as with Escherichia coli or chemical parameters such a lead or trihalomethanes. If they exceed limits, the regional environmental protection agencies immediately inform the competent authorities (USLs) and they, in turn, take immediate corrective action.

Whenever results fail to comply with regulations, Hera immediately takes action to restore normal supply conditions by adjusting the treatment systems (especially as regards disinfection stations), flushing the network to remove any sediment in the pipes and/or replacement of sections of pipe. In more critical cases, Hera makes drinking water available for alimentary use via tankers or the distribution of water packs until the problem has been solved.

In tutti i casi di risultato non conforme alla legge, Hera attua interventi tempestivi per il ripristino delle normali condizioni di erogazione consistenti nella regolazione dei sistemi di trattamento (con particolare riguardo alle stazioni di disinfezione), nei lavaggi di rete per la rimozione di sedimenti nelle condotte, fino alla sostituzione di tratti di condotte. Nei casi più critici Hera rende disponibile l’acqua potabile per gli usi alimentari attraverso autobotti o attraverso la distribuzione di sacchetti preconfezionati, fino alla totale risoluzione dell’evento non conforme.

During 2020, no exceptions were granted for compliance with the limits set by Legislative Decree no. 31/2001 and 26 non-drinking water municipal ordinances were issued in the Marche region. These orders affected less than 0.001% of the users served by the Group.

The reported orders affected almost exclusively small municipalities. In almost all cases, the orders were related to problems at disinfection plants in small water networks where control and regulation are generally more difficult due to low flow rates and location in remote areas. Half of the citizens involved are linked to two orders issued by the Municipality of Mercatello sul Metauro (Pesaro-Urbino area) for problems related to the sudden deterioration of the quality of water supply sources due to weather events.

In the area managed by Hera Spa in Emilia-Romagna and in the area managed by AcegasApsAmga, no drinking water non-potability orders were issued.

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