Chemical and radiological sample results

MS0170043 , Walls Water Assn- Lake Forest

30 of the 61 analytes this system has been tested for have been detected at least once, across 302 samples on record.

The other 31 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 302 samples on record, detections range from September 9, 1993 to July 28, 2026. 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.

Every analyte ever detected for Walls Water Assn- Lake Forest, with how many results found it and when it was first and last detected. Covers the whole record, not only the samples listed below.
Analyte	Kind	Detected in	First detected	Last detected
Copper, Free 1022	Inorganic Chemical	203 of 212 results	Sep 9, 1993	Sep 26, 2024
Lead 1030	Inorganic Chemical	78 of 212 results	Sep 9, 1993	Sep 26, 2024
TTHM 2950	Organic Chemical	13 of 13 results	May 19, 2004	Jul 28, 2026
Barium 1010	Inorganic Chemical	11 of 11 results	May 14, 2002	Feb 4, 2025
Fluoride 1025	Inorganic Chemical	10 of 11 results	May 14, 2002	Feb 4, 2025
Total Haloacetic Acids (Haa5) 2456	Organic Chemical	9 of 12 results	Sep 18, 2008	Mar 18, 2024
Chloroform 2941	Organic Chemical	8 of 8 results	Sep 18, 2008	Jul 28, 2026
Bromodichloromethane 2943	Organic Chemical	8 of 8 results	Sep 18, 2008	Jul 28, 2026
Chromium 1020	Inorganic Chemical	7 of 11 results	Jan 26, 2004	Feb 4, 2025
Dichloroacetic Acid 2451	Organic Chemical	5 of 7 results	Sep 18, 2008	Aug 25, 2020
Gross Alpha, Incl. Radon & U 4002	Radionuclide	5 of 5 results	Mar 7, 2012	Oct 4, 2012
Nitrate-Nitrite 1038	Inorganic Chemical	4 of 23 results	Mar 21, 2016	Feb 2, 2021
Nitrate 1040	Inorganic Chemical	4 of 23 results	Mar 21, 2016	Feb 2, 2021
Trichloroacetic Acid 2452	Organic Chemical	4 of 7 results	Sep 18, 2008	Aug 25, 2020
Dibromochloromethane 2944	Organic Chemical	3 of 8 results	Sep 18, 2008	Jul 28, 2026
Sodium 1052	Inorganic Chemical	3 of 3 results	Sep 17, 2019	Oct 15, 2024
Nickel 1036	Inorganic Chemical	3 of 11 results	Jan 25, 2006	Apr 14, 2014
Selenium 1045	Inorganic Chemical	3 of 11 results	Jan 26, 2004	Jan 25, 2006
Gross Alpha, Excl. Radon & U 4000	Radionuclide	2 of 2 results	Sep 23, 2009	Mar 15, 2010
Gross Beta Particle Activity 4100	Radionuclide	2 of 2 results	Sep 23, 2009	Mar 15, 2010
Gross Alpha Particle Activity 4109	Radionuclide	2 of 2 results	Sep 23, 2009	Mar 15, 2010
Cadmium 1015	Inorganic Chemical	2 of 11 results	Mar 2, 2005	Jan 25, 2006
Sulfate 1055	Inorganic Chemical	2 of 2 results	May 14, 2002	Jan 26, 2004
Cyanide 1024	Inorganic Chemical	1 of 10 results	Aug 19, 2025	Aug 19, 2025
Nitrite 1041	Inorganic Chemical	1 of 23 results	Jan 10, 2022	Jan 10, 2022
Monochloroacetic Acid 2450	Organic Chemical	1 of 7 results	Jul 12, 2012	Jul 12, 2012
Monobromoacetic Acid 2453	Organic Chemical	1 of 7 results	Jul 12, 2012	Jul 12, 2012
Combined Radium (-226 & -228) 4010	Radionuclide	1 of 7 results	Sep 23, 2009	Sep 23, 2009
Radium-226 4020	Radionuclide	1 of 7 results	Sep 23, 2009	Sep 23, 2009
Radium-228 4030	Radionuclide	1 of 7 results	Sep 23, 2009	Sep 23, 2009

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 61–70 of 302 samples, newest first — collected July 17, 2019 to May 17, 2021. The summary above covers all 302.

37 results from the 10 samples listed here: 19 detected, 18 not detected. Across the whole record it is 398 of 909. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

Units in this table

Sodium is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Chemical and radiological sample results for Walls Water Assn- Lake Forest, every result from 61 to 70 of 302 samples shown, newest first. Not detected means the amount was below the level the laboratory can reliably report, which is given beside it.
Result	Analyte	Monitoring period
Collected May 17, 2021 13:05 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample CN-210518-047 Laboratory MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected May 17, 2021 13:05, sampling point TF080	Cyanide 1024 EPA method QC10204001X	Jan 1, 2020 – Dec 31, 2022
Collected Feb 2, 2021 13:20 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample NA-210203-006 Laboratory MSDH Lab
61 mg/l , sample collected Feb 2, 2021 13:20, sampling point TF080	Sodium 1052 EPA method 200.7	Not recorded
Collected Feb 2, 2021 13:20 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample NI-210203-020 Laboratory MSDH Lab
0.117 mg/l , sample collected Feb 2, 2021 13:20, sampling point TF080	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2021 – Dec 31, 2021
0.117 mg/l , sample collected Feb 2, 2021 13:20, sampling point TF080	Nitrate 1040 EPA method QC10107041C	Jan 1, 2021 – Dec 31, 2021
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 2, 2021 13:20, sampling point TF080	Nitrite 1041 EPA method QC10107041C	Jan 1, 2021 – Dec 31, 2021
Collected Jan 19, 2021 13:30 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample IN-210120-025 Laboratory MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 13:30, sampling point TF080	Arsenic 1005 EPA method 200.8	Jan 1, 2020 – Dec 31, 2022
0.0344 mg/l , sample collected Jan 19, 2021 13:30, sampling point TF080	Barium 1010 EPA method 200.8	Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 13:30, sampling point TF080	Cadmium 1015 EPA method 200.8	Jan 1, 2020 – Dec 31, 2022
0.0007 mg/l , sample collected Jan 19, 2021 13:30, sampling point TF080	Chromium 1020 EPA method 200.8	Jan 1, 2020 – Dec 31, 2022
0.815 mg/l , sample collected Jan 19, 2021 13:30, sampling point TF080	Fluoride 1025 EPA method QC 10-109-12-2-A	Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 13:30, sampling point TF080	Mercury 1035 EPA method 200.8	Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 13:30, sampling point TF080	Nickel 1036 EPA method 200.8	Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 13:30, sampling point TF080	Selenium 1045 EPA method 200.8	Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 13:30, sampling point TF080	Antimony, Total 1074 EPA method 200.8	Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 13:30, sampling point TF080	Beryllium, Total 1075 EPA method 200.8	Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 13:30, sampling point TF080	Thallium, Total 1085 EPA method 200.8	Jan 1, 2020 – Dec 31, 2022
Collected Aug 25, 2020 14:15 Sampling point MRT000 Max. Res. Time Sample type Routine Lab sample 200826-006HA Laboratory MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Aug 25, 2020 14:15, sampling point MRT000	Monochloroacetic Acid 2450 EPA method 552.2	Not recorded
0.006 mg/l , sample collected Aug 25, 2020 14:15, sampling point MRT000	Dichloroacetic Acid 2451 EPA method 552.2	Not recorded
0.002 mg/l , sample collected Aug 25, 2020 14:15, sampling point MRT000	Trichloroacetic Acid 2452 EPA method 552.2	Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 25, 2020 14:15, sampling point MRT000	Monobromoacetic Acid 2453 EPA method 552.2	Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 25, 2020 14:15, sampling point MRT000	Dibromoacetic Acid 2454 EPA method 552.2	Not recorded
0.008 mg/l , sample collected Aug 25, 2020 14:15, sampling point MRT000	Total Haloacetic Acids (Haa5) 2456	Jan 1, 2020 – Dec 31, 2020
Collected Aug 25, 2020 14:15 Sampling point MRT000 Max. Res. Time Sample type Routine Lab sample 200826-004TH Laboratory MSDH Lab
24.2 ug/l , sample collected Aug 25, 2020 14:15, sampling point MRT000	Chloroform 2941 EPA method 524.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 25, 2020 14:15, sampling point MRT000	Bromoform 2942 EPA method 524.2	Not recorded
4.76 ug/l , sample collected Aug 25, 2020 14:15, sampling point MRT000	Bromodichloromethane 2943 EPA method 524.2	Not recorded
1.26 ug/l , sample collected Aug 25, 2020 14:15, sampling point MRT000	Dibromochloromethane 2944 EPA method 524.2	Not recorded
30.2 ug/l , sample collected Aug 25, 2020 14:15, sampling point MRT000	TTHM 2950	Jan 1, 2020 – Dec 31, 2020
Collected Jan 21, 2020 14:02 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample 200122-037NI Laboratory MSDH Lab
0.12 mg/l , sample collected Jan 21, 2020 14:02, sampling point TF080	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2020 – Dec 31, 2020
0.12 mg/l , sample collected Jan 21, 2020 14:02, sampling point TF080	Nitrate 1040 EPA method QC10107041C	Jan 1, 2020 – Dec 31, 2020
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 21, 2020 14:02, sampling point TF080	Nitrite 1041 EPA method QC10107041C	Jan 1, 2020 – Dec 31, 2020
Collected Sep 17, 2019 11:05 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample 680-174320-112 Laboratory Test America-Savannah
57000 ug/l , sample collected Sep 17, 2019 11:05, sampling point TF080	Sodium 1052 EPA method 200.7	Not recorded
Collected Aug 29, 2019 Sampling point DS000 Distribution Sample type Routine Lab sample 041923644-0001 Laboratory Emsl Analytical, Inc.
Not detected below 0.18 Minimum Reporting Level , sample collected Aug 29, 2019, sampling point DS000	Asbestos 1094 EPA method 100.2	Not recorded
Collected Jul 17, 2019 13:10 Sampling point MRT000 Max. Res. Time Sample type Routine Lab sample 190718-007TH Laboratory MSDH Lab
2.95 ug/l , sample collected Jul 17, 2019 13:10, sampling point MRT000	Chloroform 2941 EPA method 524.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 17, 2019 13:10, sampling point MRT000	Bromoform 2942 EPA method 524.2	Not recorded
1.25 ug/l , sample collected Jul 17, 2019 13:10, sampling point MRT000	Bromodichloromethane 2943 EPA method 524.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 17, 2019 13:10, sampling point MRT000	Dibromochloromethane 2944 EPA method 524.2	Not recorded
4.2 ug/l , sample collected Jul 17, 2019 13:10, sampling point MRT000	TTHM 2950	Jan 1, 2019 – Dec 31, 2019

Collected
May 17, 2021 13:05

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
CN-210518-047

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2020 – Dec 31, 2022
- Cyanide 1024 EPA method QC10204001X
  
  Result
  Not detected below 0.015 mg/l Minimum Reporting Level
Collected
Feb 2, 2021 13:20

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
NA-210203-006

Laboratory
MSDH Lab

Monitoring period
Not recorded
- Sodium 1052 EPA method 200.7
  
  Result
  61 mg/l
Collected
Feb 2, 2021 13:20

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
NI-210203-020

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2021 – Dec 31, 2021
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  0.117 mg/l
- Nitrate 1040 EPA method QC10107041C
  
  Result
  0.117 mg/l
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level
Collected
Jan 19, 2021 13:30

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
IN-210120-025

Laboratory
MSDH Lab
- Arsenic 1005 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2020 – Dec 31, 2022
- Barium 1010 EPA method 200.8
  
  Result
  0.0344 mg/l
  
  Monitoring period
  Jan 1, 2020 – Dec 31, 2022
- Cadmium 1015 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2020 – Dec 31, 2022
- Chromium 1020 EPA method 200.8
  
  Result
  0.0007 mg/l
  
  Monitoring period
  Jan 1, 2020 – Dec 31, 2022
- Fluoride 1025 EPA method QC 10-109-12-2-A
  
  Result
  0.815 mg/l
  
  Monitoring period
  Jan 1, 2020 – Dec 31, 2022
- Mercury 1035 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2020 – Dec 31, 2022
- Nickel 1036 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Selenium 1045 EPA method 200.8
  
  Result
  Not detected below 0.0025 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2020 – Dec 31, 2022
- Antimony, Total 1074 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2020 – Dec 31, 2022
- Beryllium, Total 1075 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2020 – Dec 31, 2022
- Thallium, Total 1085 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2020 – Dec 31, 2022
Collected
Aug 25, 2020 14:15

Sampling point
MRT000 Max. Res. Time

Sample type
Routine

Lab sample
200826-006HA

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
  0.006 mg/l
  
  Monitoring period
  Not recorded
- Trichloroacetic Acid 2452 EPA method 552.2
  
  Result
  0.002 mg/l
  
  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
  0.008 mg/l
  
  Monitoring period
  Jan 1, 2020 – Dec 31, 2020
Collected
Aug 25, 2020 14:15

Sampling point
MRT000 Max. Res. Time

Sample type
Routine

Lab sample
200826-004TH

Laboratory
MSDH Lab
- Chloroform 2941 EPA method 524.2
  
  Result
  24.2 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
  4.76 ug/l
  
  Monitoring period
  Not recorded
- Dibromochloromethane 2944 EPA method 524.2
  
  Result
  1.26 ug/l
  
  Monitoring period
  Not recorded
- TTHM 2950
  
  Result
  30.2 ug/l
  
  Monitoring period
  Jan 1, 2020 – Dec 31, 2020
Collected
Jan 21, 2020 14:02

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
200122-037NI

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2020 – Dec 31, 2020
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  0.12 mg/l
- Nitrate 1040 EPA method QC10107041C
  
  Result
  0.12 mg/l
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level
Collected
Sep 17, 2019 11:05

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
680-174320-112

Laboratory
Test America-Savannah

Monitoring period
Not recorded
- Sodium 1052 EPA method 200.7
  
  Result
  57000 ug/l
Collected
Aug 29, 2019

Sampling point
DS000 Distribution

Sample type
Routine

Lab sample
041923644-0001

Laboratory
Emsl Analytical, Inc.

Monitoring period
Not recorded
- Asbestos 1094 EPA method 100.2
  
  Result
  Not detected below 0.18 Minimum Reporting Level
Collected
Jul 17, 2019 13:10

Sampling point
MRT000 Max. Res. Time

Sample type
Routine

Lab sample
190718-007TH

Laboratory
MSDH Lab
- Chloroform 2941 EPA method 524.2
  
  Result
  2.95 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
  1.25 ug/l
  
  Monitoring period
  Not recorded
- Dibromochloromethane 2944 EPA method 524.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- TTHM 2950
  
  Result
  4.2 ug/l
  
  Monitoring period
  Jan 1, 2019 – Dec 31, 2019

Routine (10).