<s>[INST] The next text is a question of a member of the European parliament:"In a complaint lodged at the end of August 2008 with the Brescia environmental unit (which is responsible for Lombardy as a whole), the inhabitants of Treviglio expressed their deep concern at the alleged contamination of the water table by hexavalent chromium and the potentially disastrous effects on the health of thousands of people.  Domestic tap water in Treviglio is showing peak concentrations of 14micrograms of chromium per litre.  While admitting that since 2000 there has been hexavalent chromium in the domestic water supply (with a maximum concentration of 21micrograms per litre during the period 2004‑05), the local council maintains that the health authorities have always certified the tap water as drinkable, since the reference threshold for chromium (chromium VI + chromium III) is the 50micrograms laid down in legislative decree 31/2001 on the quality of water intended for human consumption. However, those who criticise the council's failure to act point to Legislative Decree471/1999, which sets the limit at 5micrograms of ChromiumVI, although this threshold applies to groundwater.    Given the uncertainty as to what standards should apply, will the Commission answer the following:      1.  Can it say what rules establish the maximum limit for the presence of hexavalent chromium in groundwater and tap water?      2.  Have any studies been conducted with support from the Commission into the effects on human health of the inhalation and absorption of hexavalent chromium?      3.  Does it not think that the alleged presence of chromium should be investigated on the spot as a matter of urgency?"
Analyze carefully the text and assign it to the most relevant policy area among those listed below. Do not explain your answer and return only a number.
Policy area numbers: 1 = Macroeconomics
2 = Civil Rights, Minority Issues and Civil Liberties
3 = Health
4 = Agriculture and Fisheries
5 = Labour, employment and pensions
6 = Education
7 = Environment
8 = Energy
9 = Immigration
10 = Transportation
12 = Law and Crime
13 = Social welfare
14 = Regional and Urban issues and Planning
15 = Banking, finance and domestic commerce issues
16 = Defence
17 = Space, science, technology, and communications issues
18 = Foreign trade
19 = International affairs and foreign aid
20 = Governance and government
21 = Public Lands, Water Management and Territorial Issues
23 = Culture and media
[/INST]. Answer = [7]. </s>
In a complaint lodged at the end of August 2008 with the Brescia environmental unit (which is responsible for Lombardy as a whole), the inhabitants of Treviglio expressed their deep concern at the alleged contamination of the water table by hexavalent chromium and the potentially disastrous effects on the health of thousands of people.  Domestic tap water in Treviglio is showing peak concentrations of 14micrograms of chromium per litre.  While admitting that since 2000 there has been hexavalent chromium in the domestic water supply (with a maximum concentration of 21micrograms per litre during the period 2004‑05), the local council maintains that the health authorities have always certified the tap water as drinkable, since the reference threshold for chromium (chromium VI + chromium III) is the 50micrograms laid down in legislative decree 31/2001 on the quality of water intended for human consumption. However, those who criticise the council's failure to act point to Legislative Decree471/1999, which sets the limit at 5micrograms of ChromiumVI, although this threshold applies to groundwater.    Given the uncertainty as to what standards should apply, will the Commission answer the following:      1.  Can it say what rules establish the maximum limit for the presence of hexavalent chromium in groundwater and tap water?      2.  Have any studies been conducted with support from the Commission into the effects on human health of the inhalation and absorption of hexavalent chromium?      3.  Does it not think that the alleged presence of chromium should be investigated on the spot as a matter of urgency?