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PS Code Transition


Water System No. : CA1910087 Federal Type : C
Water System Name : METROPOLITAN WATER DIST. OF SO. CAL. State Type : C
Principal County Served : LOS ANGELES Primary Source : SW
Status : A Activity Date : 03-22-1979
Distribution System Classification : D5 Max Treatment Plant Classification : T5

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
1910087-002 CA1910087_002_002 002 002 CASTAIC LAKE-FOOTHILL FEEDER CONTROL ST A
1910087-003 CA1910087_003_003 003 003 DIEMER PLANT EFFLUENT - TREATED A
1910087-004 CA1910087_004_004 004 004 DIEMER PLANT INFLUENT - RAW A
1910087-005 CA1910087_005_005 005 005 JENSEN PLANT EFFLUENT - TREATED A
1910087-006 CA1910087_006_006 006 006 JENSEN PLANT INFLUENT - RAW A
1910087-007 CA1910087_007_007 007 007 LAKE HAVASU - NEAR WHITSETT INTAKE A
1910087-008 CA1910087_008_008 008 008 LAKE MATHEWS HEADWORKS (EFFLUENT) A
1910087-009 CA1910087_009_009 009 009 LAKE MEAD (NEAR DAM) - DIST SYS - RAW A
1910087-010 CA1910087_010_010 010 010 LAKE PERRIS (EFFLNT/SURFCE) - RAW A
1910087-012 CA1910087_012_012 012 012 LAKE SKINNER OUTLET CONDUIT A
1910087-013 CA1910087_013_013 013 013 MILLS PLANT EFFLUENT - TREATED A
1910087-014 CA1910087_014_014 014 014 MILLS PLANT INFLUENT - RAW A
1910087-015 CA1910087_015_015 015 015 SAN JACINTO TUNNEL - DIST SYS - RAW A
1910087-016 CA1910087_016_016 016 016 SILVERWOOD LAKE EFF - DEVIL CYN AFTERBAY A
1910087-017 CA1910087_017_017 017 017 SKINNER PLANT EFFLUENT #1 - TREATED A
1910087-019 CA1910087_019_019 019 019 SKINNER PLANT INFLUENT - RAW A
1910087-020 CA1910087_020_020 020 020 WEYMOUTH PLANT EFFLUENT - TREATED A
1910087-021 CA1910087_021_021 021 021 WEYMOUTH PLANT INFLUENT - RAW A
1910087-022 CA1910087_022_022 022 022 JENSEN PLANT - MONITORING WELL 01 A
1910087-023 CA1910087_023_023 023 023 DIAMOND VALLEY LAKE - WB CENTER - RAW A
1910087-024 CA1910087_024_024 024 024 DIAMOND VALLEY LAKE INLET/OUTLET - RAW A
1910087-025 CA1910087_025_025 025 025 LAKE MATHEWS INLET - DIST SYS - RAW A
1910087-026 CA1910087_026_026 026 026 SKINNER RESERVOR EFFLUENT - TREATED A
1910087-027 CA1910087_027_027 027 027 LAKE PERRIS OUTLET TOWER (9M) - RAW A
1910087-029 CA1910087_029_029 029 029 LAKE SKINNER OUTLET TOWER - RAW A
1910087-030 CA1910087_030_030 030 030 CASTAIC LAKE LOW TOWER A
1910087-031 CA1910087_031_031 031 031 DIAMOND VALLEY LAKE OUTLET TOWER A
1910087-032 CA1910087_032_032 032 032 LAKE MATHEWS OUTLET TOWER NO. 2 A
1910087-033 CA1910087_033_033 033 033 LAKE MATHEWS OUTLET TOWER NO. 1 A
1910087-034 CA1910087_034_034 034 034 SILVERWOOD LAKE OUTLET TOWER A
1910087-036 CA1910087_036_036 036 036 LOS ANGELES AQUEDUCT A
1910087-037 CA1910087_037_037 037 037 SKINNER PLANT EFFLUENT #3 - TREATED A
1910087-042 CA1910087_042_042 042 042 COLORADO RIVER AQUEDUCT A
1910087-043 CA1910087_043_043 043 043 SILVERWOOD LAKE - RIALTO PIPELINE CB-19 A
1910087-044 CA1910087_044_044 044 044 DEVIL CYN 2ND AFTERBAY OUTLET STRUCTURE A
1910087-800 CA1910087_DST_800 DST 800 CA-2 - S...* A
1910087-801 CA1910087_DST_801 DST 801 LV-2 - S...* A
1910087-802 CA1910087_DST_802 DST 802 B-5 - ST...* A
1910087-803 CA1910087_DST_803 DST 803 SEPCYNCF...* A
1910087-804 CA1910087_DST_804 DST 804 CM-1 - S...* A
1910087-805 CA1910087_DST_805 DST 805 CM-10 - ...* A
1910087-806 CA1910087_DST_806 DST 806 OC-88 - ...* A
1910087-807 CA1910087_DST_807 DST 807 SA-6 - S...* A
1910087-808 CA1910087_DST_808 DST 808 CARCRKPC...* A
1910087-809 CA1910087_DST_809 DST 809 CENB-35 ...* A
1910087-810 CA1910087_DST_810 DST 810 F-8 - ST...* A
1910087-811 CA1910087_DST_811 DST 811 OC-53 - ...* A
1910087-812 CA1910087_DST_812 DST 812 EM-23 - ...* A
1910087-813 CA1910087_DST_813 DST 813 EM-12C -...* A
1910087-814 CA1910087_DST_814 DST 814 WR-24E -...* A
1910087-815 CA1910087_DST_815 DST 815 EM-17 - ...* A
1910087-816 CA1910087_DST_816 DST 816 SD-1A - ...* A
1910087-817 CA1910087_DST_817 DST 817 SD-7 - S...* A
1910087-818 CA1910087_DST_818 DST 818 WR-26 - ...* A
1910087-819 CA1910087_DST_819 DST 819 CENB-14 ...* A
1910087-820 CA1910087_DST_820 DST 820 FM-1 - S...* A
1910087-821 CA1910087_DST_821 DST 821 PM-22 - ...* A
1910087-822 CA1910087_DST_822 DST 822 RAMPCS -...* A
1910087-823 CA1910087_DST_823 DST 823 CENB-1 -...* A
1910087-824 CA1910087_DST_824 DST 824 GARINF -...* A
1910087-825 CA1910087_DST_825 DST 825 GAREFF -...* A
1910087-826 CA1910087_DST_826 DST 826 USG-5 - ...* A
1910087-827 CA1910087_DST_827 DST 827 G-1 - ST...* A
1910087-828 CA1910087_DST_828 DST 828 BH-1 - S...* A
1910087-829 CA1910087_DST_829 DST 829 SMN-1 - ...* A
1910087-830 CA1910087_DST_830 DST 830 WB-23 - ...* A
1910087-831 CA1910087_DST_831 DST 831 WB-17 - ...* A
1910087-832 CA1910087_DST_832 DST 832 WB-28 - ...* A
1910087-833 CA1910087_DST_833 DST 833 WB-4 - S...* A
1910087-834 CA1910087_DST_834 DST 834 T-1 - ST...* A
1910087-835 CA1910087_DST_835 DST 835 OAK ST. ...* A
1910087-836 CA1910087_DST_836 DST 836 LA-21 - ...* A
1910087-837 CA1910087_DST_837 DST 837 WB-22 - ...* A
1910087-838 CA1910087_DST_838 DST 838 CCF-0 - ...* A
1910087-839 CA1910087_DST_839 DST 839 MX-0 - S...* A
1910087-840 CA1910087_DST_840 DST 840 SCF-0 - ...* A
1910087-841 CA1910087_DST_841 DST 841 CENB-38 ...* A
1910087-842 CA1910087_DST_842 DST 842 LB-4 - S...* A
1910087-843 CA1910087_DST_843 DST 843 CENB-13 ...* A
1910087-844 CA1910087_DST_844 DST 844 WB-9 - S...* A
1910087-845 CA1910087_DST_845 DST 845 LB-8 - S...* A
1910087-846 CA1910087_DST_846 DST 846 LB-7A - ...* A
1910087-847 CA1910087_DST_847 DST 847 F-4 - ST...* A
1910087-848 CA1910087_DST_848 DST 848 OC-55 - ...* A
1910087-849 CA1910087_DST_849 DST 849 WILPCS -...* A
1910087-LCR CA1910087_DST_LCR DST LCR Lead and Copper Sample Sites ** A
1910087-001 CA1910087_001_001 001 001 CASTAIC LAKE-BOAT DOCK - DIST SYS - RAW I
1910087-011 CA1910087_011_011 011 011 LAKE SKINNER-SKINNER PLNT INFL 02-DIST-R I
1910087-018 CA1910087_018_018 018 018 SKINNER PLANT EFFLUENT #2 - TREATED I
1910087-028 CA1910087_028_028 028 028 CASTAIC LAKE OUTLET TOWER - RAW I
1910087-035 CA1910087_035_035 035 035 SANTA ANA RIVER WATER I
1910087-038 CA1910087_038_038 038 038 HAYFIELD WELL H27P 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.