Country
|
Chlorine
|
Chlorine Dioxide
|
Chloramines
|
Ozone
|
UV
|
| Austria |
1 |
3 |
- |
3 |
3 |
| Belgium (a) |
1 |
3 |
- |
3 |
3 |
| Denmark |
- |
- |
- |
- |
- |
| Finland |
1 |
3 |
3 |
3 |
3 |
| France |
2 |
2 |
- |
2 |
- |
| Germany |
1 |
1 |
- |
2 |
3 |
| Great-Britain |
1 |
3 |
3 |
3 |
3 |
| Greece |
1 |
- |
- |
- |
- |
| Ireland |
1 |
- |
- |
3 |
- |
| Italy |
1 |
1 |
- |
3 |
- |
| Luxembourg |
- |
- |
- |
- |
- |
| Holland (b) |
2 |
2 |
- |
1 |
3 |
| Portugal |
1 |
- |
- |
- |
- |
| Spain |
1 |
3 |
2 |
2 |
- |
| Sweden |
1 |
3 |
2 |
- |
- |
|