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Monitoring Results for Individual Sampling Points
(From 2011 to present only,
for prior to 2011 results please go to EDT Download Page)


Water System No. : CA1910036 Federal Type : C
Water System Name : CALIFORNIA WATER SERVICE CO. - ELA State Type : C
Principal County Served : LOS ANGELES Primary Source : SWP
Status : A Activity Date : 01-01-1976
Distribution System Classification : D5 Max Treatment Plant Classification : T3

NOTICE TO USERS OF THE DATABASE: Users of this database should use care in interpreting these data. Data that does not meet Division of Drinking Water (DDW) data quality objectives is not included and the provided data may not be representative of water served by a water system. For example, the presence of a contaminant in a particular source of water at a given concentration does not necessarily mean that the water from that source was served by the water system to its customers, or, if served, that the contaminant was present at that concentration. Water systems may not use certain sources or may treat or blend them prior to serving the water to customers.

Questions about contaminants in particular sources are best addressed by the specific public water system, or by the associated DDW district office.

The Division of Drinking Water's (DDW's) drinking water quality monitoring schedules identify upcoming required testing of drinking water for water systems in California. These documents should not be used for determining whether water systems are in compliance with monitoring requirements. The purpose for providing these monitoring schedules is to allow water systems to verify that their sampling and analyses have been incorporated into the DDW database and to identify upcoming required monitoring/sampling events.

Notes for Water Systems:
1. The monitoring notification documents should be considered "draft," in that they will change with subsequent updates, and as monitoring data are submitted, or as monitoring schedules are revised .
2. The monitoring notification documents are derived from the DDW Water Quality database and from schedules maintained by DDW districts.
3. If your upcoming monitoring or your data identified as "DUE" are not in agreement with this document, or if your have been advised of any increased monitoring that is not reflected in the report for a particular source, please contact your District Engineer or LPA representative. For a map of the districts, please click here.
4. If your notification report for a source is blank, this does not necessarily indicate compliance with all monitoring requirements.
5. These notification reports may not reflect compliance with initial monitoring for newly regulated constituents, or constituents that require special monitoring frequencies. For example, the DDW database is unable to accurately forecast the vulnerable non-volatile synthetic organic chemical (SOC) frequency for large water systems serving over 3,300 people of 2 quarters every 3 years.
5a. For radionuclide compliance monitoring, a gross alpha (GA) particle activity measurement may be substituted for other measurements when the assigned value is less than 5 pCi/L. The assigned value is calculated by adding 0.84 of the counting error (CE) to the gross alpha result (GA + 0.84xCE). If the assigned value is greater than 5 pCi/L, then the water sample must be analyzed for uranium per Section 64442, Article 5, Chapter 15, Division 4, Title 22 of the California Code of Regulations. In addition, if the difference between the assigned value and the uranium measurement [GA + (0.84 x CE) - U] is greater than 5 pCi/L, analysis for Radium-226 and Radium-228 is required. If you have specific questions, contact your DDW District Office.
6. Some Nitrate (as N) results under storet code 00618, will have a result of �N/A� which stands for �Not Applicable.� This stems from the change in regulation requiring that all nitrate sampling be reported as Nitrate (as N) starting January 1, 2016. Prior nitrate sampling was reported as Nitrate (as NO3). With this change in nitrate reporting requirements, the monitoring schedules have captured the last date of Nitrate (as NO3) sampling and applied it to Nitrate (as N) in determining the next due date [unless there have been Nitrate (as N) samples collected]. The Nitrate (as NO3) result, however, does not carry over to Nitrate (as N) which is why there may be a notation in the �Constituent Identification� column to reference storet code 71850 for the last nitrate result. In these instances, the �Constituent Identification� column will say, �NITRATE (as N) � [see 71850].� Any questions should be referred to your District Engineer.  
Test Legends:
  • PS Code = Primary Station Code; used by laboratories to upload water quality data
  • Old PS Code = (Water System Number)-(Sample Point ID)
  • New PS Code = (Water System Number)_(Facility ID)_(Sampling Point ID) to be used by laboratories to upload water quality data when CLIP (California Laboratory Intake Portal) is implemented
  • Facility Status: A = Active; P = Proposed
  • Certain PS Codes have been removed from this table as they are not intended to have water quality data electronically reported. As an example, a water system may have a PS Code to represent Well 01 and another PS Code to represent Well 01 Chlorination. However, water quality data should only be reported to the PS Code for Well 01. The PS Code for Well 01 Chlorination would be removed from the list to avoid confusion in uploading data. If you notice that a PS Code is missing from the list that may be needed for uploading water quality data, please contact your District Office or Local County Primacy Agency.

Click to hide / show columns: Old PS Code | New PS Code | Facility ID | Sample Point ID | Sample Point Name | Status


Monitoring Schedules for All Sampling Points
Water System Sampling Points
Old PS Codes New PS Codes Facility ID Sample Point ID Sample Point Name Status
1910036-004 CA1910036_004_004 004 004 WELL 10-03 A
1910036-006 CA1910036_006_006 006 006 WELL 13-02 A
1910036-011 CA1910036_011_011 011 011 WELL 22-01 A
1910036-012 CA1910036_012_012 012 012 WELL 25-01 A
1910036-023 CA1910036_023_023 023 023 WELL 38-02 A
1910036-025 CA1910036_025_025 025 025 WELL 43-01 A
1910036-034 CA1910036_034_034 034 034 WELL 54-01 A
1910036-036 CA1910036_036_036 036 036 MWD CONNECTION ELA CB14 - TREATED A
1910036-037 CA1910036_037_037 037 037 MWD CONNECTION, CB 01 - TREATED A
1910036-038 CA1910036_038_038 038 038 MWD CONNECTION, CB 39 - TREATED A
1910036-039 CA1910036_039_039 039 039 WELL 38-02 MN TRTMNT EFFLUENT A
1910036-042 CA1910036_045_042 045 042 WELL 43-01 25% UPPER PORT A
1910036-043 CA1910036_045_043 045 043 WELL 43-01 50% MIDDLE PORT A
1910036-044 CA1910036_045_044 045 044 WELL 43-01 75% LOWER PORT A
1910036-045 CA1910036_045_045 045 045 WELL 43-01 EFFLUENT (PRE-CHLORAMINATION) A
1910036-046 CA1910036_046_046 046 046 WELL 43-01 EFFLUENT (POST-CHLORAMINATION A
1910036-047 CA1910036_048_047 048 047 WELL 10-03 GAC VESSELS INTERMEDIATE PORT A
1910036-048 CA1910036_048_048 048 048 GAC EFFLUENT/IX INFLUENT WELL 10-03 A
1910036-049 CA1910036_049_049 049 049 IX HIGHEST BED EFFLUENT WELL 10-03 A
1910036-050 CA1910036_050_050 050 050 IX COMB EFFL PRECHLORAMINATION WELL10-03 A
1910036-051 CA1910036_051_051 051 051 EFFLUENT POST CHLORAMINATION WELL 10-03 A
1910036-052 CA1910036_053_052 053 052 WELL 22-01 GAC INTERMEDIATE(BET.VESSELS) A
1910036-053 CA1910036_053_053 053 053 WELL 22-01 GAC EFF/PRE-CHLORAMINATION A
1910036-054 CA1910036_054_054 054 054 WELL 22-01 POST-CHLORAMINATION A
1910036-055 CA1910036_055_055 055 055 WELL 39-02 A
1910036-056 CA1910036_056_056 056 056 WELL 62-01 A
1910036-057 CA1910036_057_057 057 057 WELL 13-02 MN TRTMENT EFFLUENT A
1910036-058 CA1910036_058_058 058 058 STATION 13 PLANT EFFLUENT (POST-CHLOR) A
1910036-063 CA1910036_063_063 063 063 WELL 54 GAC LEAD VESSEL EFF/INTERMEDI A
1910036-064 CA1910036_064_064 064 064 WELL 54- GAC LAG VESSEL/75% POINT A
1910036-065 CA1910036_065_065 065 065 WELL 54 - GAC LAG VESSEL EFF/PRE-CHLORAM A
1910036-066 CA1910036_066_066 066 066 WELL 54 PLANT EFF/POST-CHLORAMINATION A
1910036-068 CA1910036_068_068 068 068 WELL 63-01 A
1910036-072 CA1910036_072_072 072 072 WELL 63-01 - PLANT EFFL / POST CHLORAMIN A
1910036-095 CA1910036_072_095 072 095 WELL 63-01- LEAD VESSEL EFFLUENT UNIT 1 A
1910036-096 CA1910036_072_096 072 096 WELL 63-01- LEAD VESSEL EFFLUENT UNIT 2 A
1910036-097 CA1910036_072_097 072 097 WELL 63-01- LEAD VESSEL EFFLUENT UNIT 3 A
1910036-098 CA1910036_072_098 072 098 WELL 63-01- LAG VESSEL MIDDLE 50% UNIT 1 A
1910036-099 CA1910036_072_099 072 099 WELL 63-01- LAG VESSEL MIDDLE 50% UNIT 2 A
1910036-100 CA1910036_072_100 072 100 WELL 63-01- LAG VESSEL MIDDLE 50% UNIT 3 A
1910036-101 CA1910036_072_101 072 101 WELL 63-01- LAG VESSEL EFFLUENT UNIT 1 A
1910036-102 CA1910036_072_102 072 102 WELL 63-01- LAG VESSEL EFFLUENT UNIT 2 A
1910036-103 CA1910036_072_103 072 103 WELL 63-01- LAG VESSEL EFFLUENT UNIT 3 A
1910036-104 CA1910036_072_104 072 104 WELL 63-01- COMB GAC EFFL/PRE CHLORAM A
1910036-073 CA1910036_073_073 073 073 WELL 39-02 -MANGANESE GRNSAND FILTER EFF A
1910036-074 CA1910036_074_074 074 074 WELL 39-02 -MANGANESE GRNSAND PLANT EFF A
1910036-075 CA1910036_075_075 075 075 WELL 62-02 A
1910036-076 CA1910036_076_076 076 076 WELL 62-01 - GRNSAND FILTER EFF/GAC INFL A
1910036-077 CA1910036_077_077 077 077 WELL 62-01 - NORTH VESSEL UP. PORT (25%) A
1910036-078 CA1910036_078_078 078 078 WELL 62-01 - NORTH VESSEL MID PORT (50%) A
1910036-079 CA1910036_079_079 079 079 WELL 62-01 - NORTH VESSEL LOW PORT (75%) A
1910036-080 CA1910036_080_080 080 080 WELL 62-01 - SOUTH VESSEL UP PORT (25%) A
1910036-081 CA1910036_081_081 081 081 WELL 62-01 - SOUTH VESSEL MID PORT (50%) A
1910036-082 CA1910036_082_082 082 082 WELL 62-01 - SOUTH VESSEL LOW PORT (75%) A
1910036-083 CA1910036_083_083 083 083 WELL 62-01-4LOG VIRUS INAC/PRE-CHLORAMIN A
1910036-084 CA1910036_084_084 084 084 WELL 62-01 - POST CHLORAMINATION A
1910036-085 CA1910036_085_085 085 085 WELL 62-02 - GRNSAND FILTER EFF/GAC INFL A
1910036-086 CA1910036_086_086 086 086 WELL 62-02 - NORTH VESSEL UP. PORT (25%) A
1910036-087 CA1910036_087_087 087 087 WELL 62-02 - NORTH VESSEL MID PORT (50%) A
1910036-088 CA1910036_088_088 088 088 WELL 62-02 - NORTH VESSEL LOW PORT (75%) A
1910036-089 CA1910036_089_089 089 089 WELL 62-02 - SOUTH VESSEL UP. PORT (25%) A
1910036-090 CA1910036_090_090 090 090 WELL 62-02 - SOUTH VESSEL MID PORT (50%) A
1910036-091 CA1910036_091_091 091 091 WELL 62-02 - SOUTH VESSEL LOW PORT (75%) A
1910036-092 CA1910036_092_092 092 092 WELL 62-02-4LOG VIRUS INAC/PRE-CHLORAMIN A
1910036-093 CA1910036_093_093 093 093 WELL 62-02 - POST CHLORAMINATION A
1910036-094 CA1910036_094_094 094 094 STATION 62 - PLANT (BLEND) EFFLUENT A
1910036-800 CA1910036_DST_800 DST 800 ELA-D-00...* A
1910036-801 CA1910036_DST_801 DST 801 ELA-D-00...* A
1910036-802 CA1910036_DST_802 DST 802 ELA-D-01...* A
1910036-803 CA1910036_DST_803 DST 803 ELA-D-01...* A
1910036-804 CA1910036_DST_804 DST 804 ELA-D-03...* A
1910036-805 CA1910036_DST_805 DST 805 ELA-D-03...* A
1910036-806 CA1910036_DST_806 DST 806 ELA-D-03...* A
1910036-807 CA1910036_DST_807 DST 807 ELA-D-03...* A
1910036-LCR CA1910036_DST_LCR DST LCR Lead and Copper Sample Sites ** A
Old PS Codes Old PS Codes Facility ID Sample Point ID Sample Point Name Status
 
*Please refer to the Stage 2 DBP Monitoring Plan Approval Letter for full sample point names.
**Please use this PS Code for all lead and copper samples.