Table 1 Number of required sampling sites required for community water system sizes, for standard monitoring (semi-annual) and reduced monitoring (annual and triennial)
Size of CWS (People served) | Number of sampling sites (standard monitoring) | Number of sampling sites (reduced monitoring) |
|---|---|---|
> 100,000 | 100 | 50 |
10,001 – 100,000 | 60 | 30 |
3301 – 10,000 | 40 | 20 |
501–3300 | 20 | 10 |
101–500 | 10 | 5 |
≤ 100 | 5 | 5 |