Monitoring Schedules

Water System No. :	CA2110002	Federal Type :	C
Water System Name :	MARIN MUNICIPAL WATER DISTRICT	State Type :	C
Principal County Served :	MARIN	Primary Source :	SW
Status :	A	Activity Date :	01-01-1976
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.

Water System Sampling Points
Monitoring Schedules for All Sampling Points
Old PS Codes	New PS Codes	Facility ID	Sample Point ID	Sample Point Name	Status
2110002-001	CA2110002_001_001	001	001	ALPINE LAKE DAM AT 10FT DEPTH	A
2110002-002	CA2110002_002_002	002	002	BON TEMPE LAKE DAM AT 10FT DEPTH	A
2110002-003	CA2110002_003_003	003	003	BON TEMPE TP - RAW WTR LAKE BT	A
2110002-004	CA2110002_004_004	004	004	BTTP-TREATED WATER-LAKE BON TEMPE	A
2110002-005	CA2110002_005_005	005	005	IGNACIO PUMP STA.-RUSSIAN RIVER	A
2110002-006	CA2110002_006_006	006	006	KENT LAKE DAM AT 10FT DEPTH	A
2110002-007	CA2110002_007_007	007	007	LAGUNITAS LAKE DAM AT 10FT DEPTH	A
2110002-008	CA2110002_008_008	008	008	NICASIO LAKE DAM AT 10FT DEPTH	A
2110002-009	CA2110002_009_009	009	009	PHOENIX LAKE DAM AT 10FT DEPTH	A
2110002-010	CA2110002_010_010	010	010	SAN GERONIMO WTP-RAW NICASIO/KENT LAKES	A
2110002-011	CA2110002_011_011	011	011	SAN GERONIMO WTP-TREATED-NICASIO/KENT	A
2110002-012	CA2110002_012_012	012	012	SOULAJULE LAKE DAM-10FT DEPTH - STANDBY	A
2110002-037	CA2110002_037_037	037	037	IGNACIO PUMP STA - RUSSIAN RIVER TREATED	A
2110002-013	CA2110002_DST_013	DST	013	DBP MINE RIDGE	A
2110002-014	CA2110002_DST_014	DST	014	DBP SMITH SADDLE	A
2110002-015	CA2110002_DST_015	DST	015	DBP SAFD	A
2110002-016	CA2110002_DST_016	DST	016	DBP2 MAR...*	A
2110002-017	CA2110002_DST_017	DST	017	DBP BTTP CWE	A
2110002-018	CA2110002_DST_018	DST	018	DBP OAK MANOR	A
2110002-019	CA2110002_DST_019	DST	019	DBP H - LINE TANK	A
2110002-025	CA2110002_DST_025	DST	025	DBP2 330...*	A
2110002-026	CA2110002_DST_026	DST	026	DBP 635 GOODHILL RD	A
2110002-027	CA2110002_DST_027	DST	027	DBP 520 SUMMIT AVE	A
2110002-028	CA2110002_DST_028	DST	028	DBP2 AT ...*	A
2110002-029	CA2110002_DST_029	DST	029	DBP2 GLE...*	A
2110002-030	CA2110002_DST_030	DST	030	DBP2 777...*	A
2110002-031	CA2110002_DST_031	DST	031	DBP 5B BON AIR RD	A
2110002-032	CA2110002_DST_032	DST	032	DBP2 156...*	A
2110002-033	CA2110002_DST_033	DST	033	DBP NORTH REDWOOD DR	A
2110002-034	CA2110002_DST_034	DST	034	DBP2 55 ...*	A
2110002-035	CA2110002_DST_035	DST	035	DBP OPPOSITE 255 CHANNING	A
2110002-036	CA2110002_DST_036	DST	036	DBP 14 MOUNT MCKINLEY RD	A
2110002-038	CA2110002_DST_038	DST	038	DBP MARINER HIGHLANDS	A
2110002-LCR	CA2110002_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.