Guidance For Providing Safe Drinking Water in Areas of Federal
Jurisdiction - Version 1
Appendix 6: Sample of Water Quality Analysis Summary
Microbiological parameters
| |
Total coliforms
(counts/100ml) |
Fecal coliforms
(counts/100ml) |
|
| MAC or IMAC |
(indicator of adverse water quality if detected in treated
water) |
(indicator of adverse water quality if detected in treated
water) |
| Number of samples |
46 |
46 |
| Number of detectable results |
0 |
0 |
| Sampling date |
04/01 - 06/30 |
04/01 - 06/30 |
| Range |
N/A |
N/A |
| Exceedence? |
No |
No |
| Typical source of contaminant |
Indicates possible presence of fecal matter |
Definite indicator of fecal contamination |
Parameters related to microbiological quality
| |
Turbidity
(NTU) |
Free chlorine - plant
(mg/l) |
Free chlorine - system
(mg/l) |
|
| MAC or IMAC |
1 |
- |
- |
| Number of samples |
90 |
360 |
360 |
| Number of detectable results |
90 |
360 |
360 |
| Sampling date |
04/01 - 06/30 |
04/01 - 06/30 |
04/01 - 06/30 |
| Range |
0.16 - 0.29 |
0.35 - 0.45 |
0.35 - 0.45 |
| Exceedence? |
No |
N/A |
N/A |
| Typical source of contaminant |
Indicates presence of particles in water due to treatment
difficulties |
See below |
See below |
Inorganic parameters
| |
Fluoride
(mg/l) |
Nitrate
(mg/l) |
|
| MAC or IMAC |
1.5 |
10 |
| Number of samples |
360 |
1 |
| Number of detectable results |
360 |
1 |
| Sampling date |
04/01 - 06/30 |
04/01 - 06/30 |
| Range |
0.7 - 1.1 |
1.2 |
| Exceedence? |
No |
N/A |
| Typical source of contaminant |
Added to prevent tooth decay |
Natural component of water at this level |
Volatile organics
| |
Trihalomethanes
(mg/l) |
|
| MAC or IMAC |
0.1 |
| Number of samples |
1 |
| Number of detectable results |
1 |
| Sampling date |
04/01 - 06/30 |
| Range |
0.067* |
| Exceedence? |
No |
| Typical source of contaminant |
By-product of chlorination |
* THMs MAC is based on a running average of four quarterly samples.
This value is the average of the most recent four detects.
Pesticides and PCBs - none
|
