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Monitoring Schedules (new format)

Water System No. : CA1910003 Federal Type : C
Water System Name : CITY OF ARCADIA State Type : C
Principal County Served : LOS ANGELES Primary Source : GW
Status : A Activity Date : 01-01-1976
Distribution System Classification : D4 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
Monitoring Schedule for Individual Sampling Points
Old PS Codes New PS Codes Facility ID Sample Point ID Sample Point Name Status
1910003-007 CA1910003_007_007 007 007 LIVE OAK WELL A
1910003-008 CA1910003_008_008 008 008 LONGDEN WELL 01 A
1910003-011 CA1910003_011_011 011 011 ORANGE GROVE WELL 01-A A
1910003-012 CA1910003_012_012 012 012 ORANGE GROVE WELL 02-A A
1910003-013 CA1910003_013_013 013 013 ORANGE GROVE WELL 05 A
1910003-014 CA1910003_014_014 014 014 ORANGE GROVE WELL 06 A
1910003-015 CA1910003_015_015 015 015 PECK WELL 01 A
1910003-021 CA1910003_021_021 021 021 LONGDEN AIR STRIP AND BLEND - TREATED A
1910003-042 CA1910003_021_042 021 042 BLEND SOURCE - PECK WELL 01 A
1910003-022 CA1910003_022_022 022 022 ORANGE GROVE RESERVOIRS BLEND - TREATED A
1910003-023 CA1910003_023_023 023 023 ST. JOSEPH RESERVOIRS BLEND - TREATED A
1910003-024 CA1910003_024_024 024 024 MWD CONN.USG-6 - UPPER FEEDER - TREATED A
1910003-037 CA1910003_037_037 037 037 CHAPMAN WELL 07 - STANDBY A
1910003-039 CA1910003_039_039 039 039 COLORADO WELL A
1910003-040 CA1910003_040_040 040 040 LONGLEY WELL A
1910003-041 CA1910003_041_041 041 041 CAMINO REAL WELL 03 A
1910003-043 CA1910003_043_043 043 043 ORANGE GROVE PLANT- SAMPLE STA. A A
1910003-044 CA1910003_044_044 044 044 ORANGE GROVE PLANT- SAMPLE STA. B A
1910003-045 CA1910003_045_045 045 045 ORANGE GROVE PLANT- SAMPLE STA. C A
1910003-046 CA1910003_046_046 046 046 ORANGE GROVE PLANT-BLENDED TO ZONE 1,2,3 A
1910003-051 CA1910003_059_051 059 051 LIVE OAK GAC UNIT 1 LEAD VESSEL A
1910003-052 CA1910003_059_052 059 052 LIVE OAK GAC UNIT 1 LAG VESSEL A
1910003-053 CA1910003_059_053 059 053 LIVE OAK GAC UNIT 2 LEAD VESSEL A
1910003-054 CA1910003_059_054 059 054 LIVE OAK GAC UNIT 2 LAG VESSEL A
1910003-055 CA1910003_059_055 059 055 LIVE OAK GAC UNIT 3 LEAD VESSEL A
1910003-056 CA1910003_059_056 059 056 LIVE OAK GAC UNIT 3 LAG VESSEL A
1910003-057 CA1910003_059_057 059 057 LIVE OAK GAC UNIT 4 LEAD VESSEL A
1910003-058 CA1910003_059_058 059 058 LIVE OAK GAC UNIT 4 LAG VESSEL A
1910003-059 CA1910003_059_059 059 059 LIVE OAK COMBINED GAC EFFLUENTS A
1910003-060 CA1910003_060_060 060 060 LIVE OAK FOREBAY EFFLUENT A
1910003-800 CA1910003_DST_800 DST 800 SITE1- 2...* A
1910003-801 CA1910003_DST_801 DST 801 SITE2- 2...* A
1910003-802 CA1910003_DST_802 DST 802 SITE3- 3...* A
1910003-803 CA1910003_DST_803 DST 803 SITE4- 8...* A
1910003-LCR CA1910003_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.