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DuPage County, California — public water systems

At a glance

8 active public water systems are filed under DuPage County, California in EPA's SDWIS records, together reporting 200 people served. The largest is Jewel Osco 3338, which reports serving 25 people.

Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

8

Population served

200

Community systems

—

Groundwater share

75%

How does DuPage County compare with other California counties?

DuPage County has the 61st-most active public water systems among the 201 counties listed for active California systems in EPA records; among the 72 with 3 or more systems, the median has 73. Its systems report 200 people served in total, the 110th-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 25 people, well below the California average of 5,706. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.

Where does DuPage County's drinking water come from?

By primary water source, DuPage County's active systems draw on purchased groundwater (6, 75%) and purchased surface water (2, 25%). Overall, 75% rely mainly on groundwater (including purchased groundwater) and 25% on surface water, compared with 85% and 15% across California. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. The county's largest system, Jewel Osco 3338, draws primarily on purchased groundwater.

What kinds of water systems operate in DuPage County?

DuPage County's active systems break down as 8 transient non-community systems (100%). A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (100%).

Water systems in DuPage County

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Active public water systems in DuPage County, California
#Water systemCountyPopulation servedTypeSource
1Jewel Osco 3338DuPage25Transient non-communityPurchased groundwater
2Jewel Osco 3240DuPage25Transient non-communityPurchased groundwater
3Tony'S Fresh MarketDuPage25Transient non-communityPurchased surface water
4Jewel Osco 0283DuPage25Transient non-communityPurchased groundwater
5Jewel Osco 3230DuPage25Transient non-communityPurchased groundwater
6Convenience Store AlcalaDuPage25Transient non-communityPurchased groundwater
7Jewel Osco 2346DuPage25Transient non-communityPurchased groundwater
8Hornbill Asian GroceryDuPage25Transient non-communityPurchased surface water

DuPage County water systems: frequently asked questions

How many public water systems are in DuPage County, California?

EPA's SDWIS records file 8 active public water systems under DuPage County, California: 8 transient non-community systems (100%).

Does DuPage County's drinking water come from groundwater or surface water?

Of the 8 active public water systems in DuPage County, 75% draw mainly on groundwater and 25% on surface water, counting purchased supplies. The largest system, Jewel Osco 3338, uses purchased groundwater.

Where can I find a water quality report for DuPage County?

Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year.

How can I check violations for a water system in DuPage County?

Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.

More California water systems

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, “Public water systems in DuPage County, California”, https://aquacensus.com/water-systems/california/dupage (data as of October 1, 2026).