This is a rebuild of Drinking Water Watch and not yet the official record. Use the agency’s current Drinking Water Watch for anything you need to rely on.
Chemical and radiological sample results
MS0650007 , Town of Polkville-Water Dept
35 of the 74 analytes this system has been tested for have been detected at least once, across 154 samples on record.
The other 39 were tested for and never found. An analyte is counted here if any result on record measured it, so this covers the whole history and not the samples listed below.
Across all 154 samples on record, detections range from October 27, 2003 to October 6, 2025. These figures cover the whole record.
What counts as a non-detect is defined in the help: Less than Indicator. This system’s violations.
What has been detected, ever
Every analyte measured above its reporting level at any point in this system’s record, most often detected first. This is not limited to the samples listed below.
| Analyte | Kind | Detected in | First detected | Last detected |
|---|---|---|---|---|
| Copper, Free 1022 | Inorganic Chemical | 61 of 61 results | Aug 16, 2007 | Aug 1, 2023 |
| Lead 1030 | Inorganic Chemical | 59 of 61 results | Aug 16, 2007 | Aug 1, 2023 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 12 of 21 results | Aug 16, 2004 | Oct 6, 2025 |
| TTHM 2950 | Organic Chemical | 11 of 21 results | Aug 16, 2004 | Oct 6, 2025 |
| Barium 1010 | Inorganic Chemical | 10 of 10 results | Oct 27, 2003 | Mar 25, 2025 |
| Dichloroacetic Acid 2451 | Organic Chemical | 8 of 16 results | Sep 12, 2007 | Oct 6, 2025 |
| Chloroform 2941 | Organic Chemical | 8 of 16 results | Nov 27, 2007 | Oct 6, 2025 |
| Bromodichloromethane 2943 | Organic Chemical | 7 of 16 results | Nov 27, 2007 | Oct 6, 2025 |
| Trichloroacetic Acid 2452 | Organic Chemical | 6 of 16 results | Sep 12, 2007 | Oct 6, 2025 |
| Dibromochloromethane 2944 | Organic Chemical | 6 of 16 results | Jul 28, 2010 | Oct 6, 2025 |
| Nickel 1036 | Inorganic Chemical | 5 of 10 results | Oct 27, 2003 | Dec 5, 2022 |
| Chromium 1020 | Inorganic Chemical | 5 of 10 results | Oct 27, 2003 | May 14, 2019 |
| Fluoride 1025 | Inorganic Chemical | 3 of 11 results | Mar 29, 2004 | Mar 25, 2025 |
| Sodium 1052 | Inorganic Chemical | 3 of 3 results | Jun 5, 2009 | Nov 13, 2023 |
| Sulfate 1055 | Inorganic Chemical | 3 of 3 results | Oct 27, 2003 | Jun 5, 2009 |
| Selenium 1045 | Inorganic Chemical | 2 of 10 results | Apr 10, 2006 | Feb 8, 2010 |
| Monobromoacetic Acid 2453 | Organic Chemical | 1 of 16 results | Oct 14, 2020 | Oct 14, 2020 |
| Monochloroacetic Acid 2450 | Organic Chemical | 1 of 16 results | Dec 7, 2016 | Dec 7, 2016 |
| Calcium 1016 | Inorganic Chemical | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| Iron 1028 | Inorganic Chemical | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| Magnesium 1031 | Inorganic Chemical | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| Manganese 1032 | Inorganic Chemical | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| Potassium 1042 | Inorganic Chemical | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| Residue, Total, Filterable 1057 | Water Quality | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| Alkalinity, Caco3 Stability 1067 | Water Quality | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| Carbon Dioxide 1901 | Water Quality | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| Color 1905 | Water Quality | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| Hardness, Total (As Caco3) 1915 | Water Quality | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| PH 1925 | Water Quality | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| Alkalinity, Total 1927 | Water Quality | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| Iron, Field Result FEFD | Inorganic Chemical | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| Calculated Sodium NACA | Water Quality | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| PH, Field Result PHFD | Water Quality | 1 of 1 result | Jun 5, 2009 | Jun 5, 2009 |
| Cadmium 1015 | Inorganic Chemical | 1 of 10 results | Apr 10, 2006 | Apr 10, 2006 |
| Cyanide 1024 | Inorganic Chemical | 1 of 10 results | Apr 19, 2005 | Apr 19, 2005 |
No date range is applied: this list draws on every sample on record. Show the last two years only.
The most recent samples, result by result
The table below lists 111–120 of 154 samples, newest first — collected March 24, 2010 to August 30, 2011. The summary above covers all 154.
47 results from the 10 samples listed here: 14 detected, 33 not detected. Across the whole record it is 228 of 687. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 0.132 mg/l , sample collected Aug 30, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0013 mg/l , sample collected Aug 30, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.3203 mg/l , sample collected Aug 30, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0013 mg/l , sample collected Aug 30, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.1776 mg/l , sample collected Aug 30, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0012 mg/l , sample collected Aug 30, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.2115 mg/l , sample collected Aug 30, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.001 mg/l , sample collected Aug 30, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 30, 2011, sampling point TF080 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2011 – Dec 31, 2011 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 30, 2011, sampling point TF080 | Nitrate 1040 EPA method 353.2 | Jan 1, 2011 – Dec 31, 2011 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 30, 2011, sampling point TF080 | Nitrite 1041 EPA method 353.2 | Jan 1, 2011 – Dec 31, 2011 |
|
||
| Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Sep 22, 2010, sampling point TF080 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2010 – Dec 31, 2010 |
| Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Sep 22, 2010, sampling point TF080 | Nitrate 1040 EPA method 353.2 | Jan 1, 2010 – Dec 31, 2010 |
| Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Sep 22, 2010, sampling point TF080 | Nitrite 1041 EPA method 353.2 | Jan 1, 2010 – Dec 31, 2010 |
|
||
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | 1,2,4-Trichlorobenzene 2378 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | Cis-1,2-Dichloroethylene 2380 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | Xylenes, Total 2955 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | Dichloromethane 2964 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | O-Dichlorobenzene 2968 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | P-Dichlorobenzene 2969 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | Vinyl Chloride 2976 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | 1,1-Dichloroethylene 2977 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | Trans-1,2-Dichloroethylene 2979 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | 1,2-Dichloroethane 2980 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | 1,1,1-Trichloroethane 2981 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | Carbon Tetrachloride 2982 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | 1,2-Dichloropropane 2983 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | Trichloroethylene 2984 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | 1,1,2-Trichloroethane 2985 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | Tetrachloroethylene 2987 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | Chlorobenzene 2989 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | Benzene 2990 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | Toluene 2991 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | Ethylbenzene 2992 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 15, 2010, sampling point TF080 | Styrene 2996 EPA method 524.2 | Jan 1, 2005 – Dec 31, 2010 |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jul 28, 2010, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 0.001 mg/l , sample collected Jul 28, 2010, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 28, 2010, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 28, 2010, sampling point MRT000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 28, 2010, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. , sample collected Jul 28, 2010, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Jan 1, 2008 – Dec 31, 2010 |
|
||
| 1.98 ug/l , sample collected Jul 28, 2010, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 28, 2010, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 1.94 ug/l , sample collected Jul 28, 2010, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 1.62 ug/l , sample collected Jul 28, 2010, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 5.54 ug/l , sample collected Jul 28, 2010, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Jan 1, 2008 – Dec 31, 2010 |
|
||
| Not detected below 15 ug/l Minimum Reporting Level , sample collected Mar 24, 2010, sampling point TF080 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2008 – Dec 31, 2010 |
-
- Collected
- Aug 30, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110831-018PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.132 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0013 mg/l
-
- Collected
- Aug 30, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110831-017PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.3203 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0013 mg/l
-
- Collected
- Aug 30, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110831-016PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.1776 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0012 mg/l
-
- Collected
- Aug 30, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110831-015PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.2115 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.001 mg/l
-
- Collected
- Mar 30, 2011
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 110331-021NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2011 – Dec 31, 2011
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Sep 22, 2010
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 100923-011NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2010 – Dec 31, 2010
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.25 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.2 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.05 mg/l Minimum Reporting Level
-
- Collected
- Sep 15, 2010
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 100916-002VO
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2010
-
1,2,4-Trichlorobenzene 2378 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Cis-1,2-Dichloroethylene 2380 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Xylenes, Total 2955 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Dichloromethane 2964 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
O-Dichlorobenzene 2968 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
P-Dichlorobenzene 2969 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Vinyl Chloride 2976 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
1,1-Dichloroethylene 2977 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Trans-1,2-Dichloroethylene 2979 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
1,2-Dichloroethane 2980 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
1,1,1-Trichloroethane 2981 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Carbon Tetrachloride 2982 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
1,2-Dichloropropane 2983 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Trichloroethylene 2984 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
1,1,2-Trichloroethane 2985 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Tetrachloroethylene 2987 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Chlorobenzene 2989 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Benzene 2990 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Toluene 2991 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Ethylbenzene 2992 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Styrene 2996 EPA method 524.2
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
- Collected
- Jul 28, 2010
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 100729-003HA
- Laboratory
- MSDH Lab
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 0.002 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 0.001 mg/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456
- Result
- 0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here.
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
- Collected
- Jul 28, 2010
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 100729-003TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- 1.98 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 1.94 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 1.62 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 5.54 ug/l
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
- Collected
- Mar 24, 2010
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 100325-010CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 15 ug/l Minimum Reporting Level
Routine (10).