ENVIRONMENTAL FINAL GOVERNING STANDARDS ITALY

ITALY - 3 Drinking Water
Contaminant
Table 3.4-b. Inorganics Monitoring Requirements (Purchased Water)
Groundwater
Baseline
Requirement 1
Surface Water
Baseline
Requirement
Trigger That
Increases
Monitoring 2
Reduced
Monitoring
Arsenic 1 sample / 3 yr Annual sample >MCL ---
Antimony 1 sample / 3 yr Annual sample >MCL ---
Barium 1 sample / 3 yr Annual sample >MCL ---
Beryllium 1 sample / 3 yr Annual sample >MCL ---
Cadmium 1 sample / 3 yr Annual sample >MCL ---
Chromium 1 sample / 3 yr Annual sample >MCL ---
Cyanide 1 sample / 3 yr Annual sample >MCL ---
Fluoride 1 sample / 3 yr Annual sample >MCL
Mercury 1 sample / 3 yr Annual sample >MCL ---
Nickel 1 sample / 3 yr Annual sample >MCL ---
Selenium 1 sample / 3 yr Annual sample >MCL ---
Thallium 1 sample / 3 yr Annual sample >MCL ---
Sodium 1 sample / 3 yr Annual sample --- ---
Asbestos 3 1 sample every 9 1 sample every 9 >MCL Yes
years
years
Total
Annual sample Quarterly >50% Nitrite ---
Nitrate/Nitrite
MCL 4
Nitrate Annual sample Quarterly >50% MCL 5 Yes 6
Nitrite Annual sample Quarterly >50% MCL 5 Yes 7
Corrosivity 8 Once Once --- ---
Notes:
1. Samples shall be taken as follows: groundwater systems shall take a minimum of one sample at every entry
point to the distribution system which is representative of each well after treatment; surface water systems
shall take at least one sample at every entry point to the distribution system after any application of
treatment or in the distribution system at a point which is representative of each source after the treatment.
2. Increased quarterly monitoring requires a minimum of 2 samples per quarter for groundwater systems and
at least 4 samples per quarter for surface water systems.
3. Necessity for analysis is predicated upon a sanitary survey conducted by the PWS.
4. Any sampling point with an analytical value ≥ 0.075 mg/L as N, (50% of the Nitrite MCL) must begin
sampling for nitrate and nitrite separately. Since nitrite readily converts to nitrate, a system can conclude
that if the total nitrate/nitrite value of a sample is less than half of the nitrite MCL, then the value of nitrite
in the sample would also be below half of its MCL.
5. Increased quarterly monitoring shall be undertaken for nitrate and nitrite if a sample is >50% of the MCL.
6. The appropriate DoD medical authority may reduce repeat sampling frequency for surface water systems to
annually if after 1 year results are