Public water system · CA4510005
ActiveCity of Redding
At a glance
City of Redding (PWSID CA4510005) is an active community water system in Shasta County, California. It reports serving 89,628 people through 30,930 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; all are health-based, and the most recent began in January 2009.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
89,628
Service connections
30,930
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does City of Redding compare with other water systems in Shasta County?
By EPA's size categories, City of Redding is a large system (10,001 to 100,000 people). Shasta County has 174 active public water systems, and City of Redding is the largest of them by population served. Its population served is about 74 times the county average of 1,208 people per system, and accounts for 43% of the 210,209 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 Redding is about 13 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 609 California systems (8.1%) list surface water as their primary source.
Who owns and regulates City of Redding?
EPA lists City of Redding 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. 31 of the 174 active systems in Shasta County (18%) are also owned by a local government.
Does City of Redding have drinking water violations?
EPA's records list 5 violations for this system; all are health-based, and the most recent began in January 2009. The violations listed here began between August 1994 and January 2009. By type: 4 contaminant level above the legal limit and 1 required treatment not met. The contaminant or rule involved most often is Arsenic (4 of them). EPA lists 5 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2009-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2008-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2008-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2008-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 1994-08-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
All 5 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 Redding: frequently asked questions
Who runs City of Redding?
City of Redding (PWSID CA4510005) 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 Redding serve?
City of Redding reports serving 89,628 people through 30,930 service connections in Shasta County, California.
Where does City of Redding get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does City of Redding have any drinking water violations?
EPA's records list 5 violations for this system; all are health-based, and the most recent began in January 2009. 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 Redding'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 5 violations for this system; all are health-based, and the most recent began in January 2009. 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 Redding's water quality report?
As a community water system, City of Redding 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 Shasta County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Bella Vista Water District | Shasta | 18,612 | Community | Surface water |
| City of Anderson | Shasta | 11,147 | Community | Groundwater |
| City of Shasta Lake | Shasta | 10,657 | Community | Surface water |
| Shasta District Fair | Shasta | 10,200 | Transient non-community | Groundwater |
| Clear Creek Csd-Anderson | Shasta | 8,900 | Community | Surface water |
| Centerville C.S.D. | Shasta | 4,151 | Community | Purchased surface water |
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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, “City of Redding, PWSID CA4510005, California”, https://aquacensus.com/water-systems/california/city-of-redding-ca4510005 (data as of October 1, 2026).