Public water system · CA4710009

Active

Weed, City of

At a glance

City of Weed (PWSID CA4710009) is an active community water system in Siskiyou County, California. It reports serving 2,662 people through 1,051 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 11 violations for this system; 4 are health-based, and the most recent began in July 2025.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

2,662

Service connections

1,051

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDCA4710009

System typeCommunity water system

Activity statusActive

Population served2,662

Service connections1,051

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyCA state drinking water program

City servedWeed

StateCalifornia

ZIP—

CountySiskiyou County

How does City of Weed compare with other water systems in Siskiyou County?

By EPA's size categories, City of Weed is a small system (501 to 3,300 people). Siskiyou County has 69 active public water systems, and City of Weed is the 5th-largest of them by population served. Its population served is about 4.5 times the county average of 593 people per system, and accounts for 6.5% of the 40,908 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active community water system reports serving 6,703 people, so City of Weed is about 60% below that figure.

What does “community water system” mean?

A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. California has 2,997 active community water systems, 40% of the state's 7,479 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,179 California systems (83%) list groundwater as their primary source.

Who owns and regulates City of Weed?

EPA lists City of Weed as owned by a local government. The CA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 21 of the 69 active systems in Siskiyou County (30%) are also owned by a local government.

Does City of Weed have drinking water violations?

EPA's records list 11 violations for this system; 4 are health-based, and the most recent began in July 2025. The violations listed here began between January 1993 and July 2025. By type: 5 monitoring and reporting, 4 contaminant level above the legal limit, 1 reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (6 of them). EPA lists 10 as resolved and 1 as unaddressed. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.

Began	Violation	Contaminant or rule	Health-based	Status
2025-07-02	ReportingNotification, Known or Potential LSL · code 4H	Lead and Copper Rule Revisionscode 5200	No	Unaddressed
2021-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2014-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2013-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2012-05-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2012-02-01	Public notice, recordkeeping or otherNotification, Public · code 06	Not reported	No	Resolved
2012-02-01	Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25	Total coliform bacteria (TCR)code 3100	No	Resolved
2012-02-01	Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31	Groundwater Rulecode 0700	No	Resolved
2005-01-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
1993-07-01	Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51	Lead and Copper Rulecode 5000	No	Resolved
1993-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved

All 11 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.

City of Weed: frequently asked questions

Who runs City of Weed?

City of Weed (PWSID CA4710009) is a community water system owned by a local government. It is regulated by the CA state drinking water program.

How many people does City of Weed serve?

City of Weed reports serving 2,662 people through 1,051 service connections in Siskiyou County, California.

Where does City of Weed get its water?

EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.

Does City of Weed have any drinking water violations?

EPA's records list 11 violations for this system; 4 are health-based, and the most recent began in July 2025. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.

Is City of Weed's water safe to drink?

AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 11 violations for this system; 4 are health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.

Where can I find City of Weed's water quality report?

As a community water system, City of Weed must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.

Other water systems in Siskiyou County

Water system	County	Population served	Type	Source
Yreka, City of	Siskiyou	7,825	Community	Surface water
Mt. Shasta, City of	Siskiyou	3,642	Community	Groundwater
Mt. Shasta Ski Park	Siskiyou	3,500	Transient non-community	Groundwater
Lake Shastina C.S.D	Siskiyou	2,790	Community	Groundwater
Lake Siskiyou Campground	Siskiyou	1,800	Transient non-community	Surface water
Dunsmuir, City of	Siskiyou	1,707	Community	Groundwater

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About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Weed, City of, PWSID CA4710009, California”, https://aquacensus.com/water-systems/california/weed-city-of-ca4710009 (data as of October 1, 2026).