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PS Code Transition


Water System No. : CA1910033 Federal Type : C
Water System Name : CALIFORNIA WATER SERVICE CO. - DOMINGUEZ State Type : C
Principal County Served : LOS ANGELES Primary Source : SWP
Status : A Activity Date : 03-22-1979
Distribution System Classification : D5 Max Treatment Plant Classification : T2

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
1910033-004 CA1910033_004_004 004 004 WELL 215-01 A
1910033-016 CA1910033_016_016 016 016 WELL 272-01 A
1910033-018 CA1910033_018_018 018 018 WELL 298-01 A
1910033-019 CA1910033_019_019 019 019 WELL 279-01 A
1910033-022 CA1910033_022_022 022 022 WELL 275-01 A
1910033-023 CA1910033_023_023 023 023 WELL 290-01 A
1910033-024 CA1910033_024_024 024 024 WELL 277-01 A
1910033-028 CA1910033_028_028 028 028 WELL 294-01 A
1910033-029 CA1910033_029_029 029 029 MWD CONN. WB-9 - LONG BEACH LATERAL-TRTD A
1910033-030 CA1910033_030_030 030 030 MWD CONN. WB-10 LONG BEACH LATERAL-TRTD A
1910033-031 CA1910033_031_031 031 031 MWD CONN. WB-14 - MIDDLE FEEDER/TREATED A
1910033-032 CA1910033_032_032 032 032 MWD CONN. WB-21-PALOS VERDES FDR/TREATED A
1910033-033 CA1910033_033_033 033 033 MWD CONN. WB-35 - VICTORIA ST.LATERAL A
1910033-034 CA1910033_034_034 034 034 MWD CONN. WB-36-PALOS VERDES FDR/TREATED A
1910033-035 CA1910033_035_035 035 035 MWD CONN. WB-39 TORRANCE LATERAL-TREATED A
1910033-036 CA1910033_036_036 036 036 WELL 297-01 A
1910033-048 CA1910033_048_048 048 048 OXIDATION EFF W298-01 A
1910033-049 CA1910033_049_049 049 049 MWD CONN. WB-19 - TREATED A
1910033-053 CA1910033_053_053 053 053 AERATION EFF W298-01 A
1910033-055 CA1910033_055_055 055 055 OXIDATION EFF W279-01 A
1910033-056 CA1910033_056_056 056 056 OXIDATION EFF W275-01 A
1910033-057 CA1910033_057_057 057 057 OXIDATION EFF W297-01 A
1910033-058 CA1910033_058_058 058 058 OXIDATION EFF W277-01 A
1910033-060 CA1910033_060_060 060 060 WELL 294-01 WTP AERATION EFF A
1910033-061 CA1910033_061_061 061 061 WTP EFF BEFORE CL2 AND NH3 A
1910033-064 CA1910033_064_064 064 064 WELL 294-01 WTP EFF POST CL2 AND NH3 A
1910033-800 CA1910033_DST_800 DST 800 DOM-C-WB...* A
1910033-801 CA1910033_DST_801 DST 801 DOM-D-00...* A
1910033-802 CA1910033_DST_802 DST 802 DOM-D-00...* A
1910033-803 CA1910033_DST_803 DST 803 DOM-D-00...* A
1910033-804 CA1910033_DST_804 DST 804 DOM-D-02...* A
1910033-805 CA1910033_DST_805 DST 805 DOM-D-02...* A
1910033-806 CA1910033_DST_806 DST 806 DOM-D-03...* A
1910033-807 CA1910033_DST_807 DST 807 DOM-D-03...* A
1910033-LCR CA1910033_DST_LCR DST LCR Lead and Copper Sample Sites ** A
1910033-001 CA1910033_001_001 001 001 WELL 201 - DESTROYED I
1910033-002 CA1910033_002_002 002 002 WELL 202 - DESTROYED I
1910033-003 CA1910033_003_003 003 003 WELL 206 - DESTROYED I
1910033-005 CA1910033_005_005 005 005 WELL 215-02 - ABANDONED I
1910033-006 CA1910033_006_006 006 006 WELL 19 - DESTROYED I
1910033-007 CA1910033_007_007 007 007 WELL 22 - DESTROYED I
1910033-008 CA1910033_008_008 008 008 WELL 23A - DESTROYED I
1910033-009 CA1910033_009_009 009 009 WELL 23-01 - ABANDONED I
1910033-010 CA1910033_010_010 010 010 WELL 24-01 - INACTIVE I
1910033-011 CA1910033_011_011 011 011 WELL 26-01 - DESTROYED I
1910033-012 CA1910033_012_012 012 012 WELL 31-01 - DESTROYED I
1910033-013 CA1910033_013_013 013 013 WELL 231-01 INACTIVE I
1910033-014 CA1910033_014_014 014 014 WELL 232-01 - DESTROYED I
1910033-015 CA1910033_015_015 015 015 WELL 232-02 - DESTROYED I
1910033-017 CA1910033_017_017 017 017 WELL 75-01 - INACTIVE I
1910033-020 CA1910033_020_020 020 020 WELL 19-01 - INACTIVE I
1910033-021 CA1910033_021_021 021 021 WELL 72-01 - INACTIVE I
1910033-025 CA1910033_025_025 025 025 BLEND-WELL 232-01,232-02 & RO EFF.DESTRD I
1910033-026 CA1910033_026_026 026 026 RO PLANT EFF (W232-03TDS REDU/BE4 BLEND) I
1910033-027 CA1910033_027_027 027 027 RO PLANT INF, WELL 232-01 & 232-02 DESTD I
1910033-037 CA1910033_037_037 037 037 WELL 219-02 - INACTIVE I
1910033-050 CA1910033_050_050 050 050 WELL 232-03 - INACTIVE I
1910033-051 CA1910033_051_051 051 051 RO PLANT EFF W232-03 (TDS REDUCTION)-INA I
1910033-052 CA1910033_052_052 052 052 RO EFF W232-03 (POST BLEND & CL2) I
1910033-054 CA1910033_054_054 054 054 WELL 203-01 - DESTROYED I
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.