Public water system · CA5700757

Active

Grassland Park Host Well (Old Yolo Bowme

At a glance

Grassland Park Host Well (Old Yolo Bowme (PWSID CA5700757) is an active transient non-community water system in Yolo County, California. It reports serving 52 people through 3 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 7 violations for this system; 5 are health-based, and the most recent began in October 2019.

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

Population served

Service connections

Primary source

Groundwater

System type

TNCWS

Transient non-community water system

System record

PWSIDCA5700757

System typeTransient non-community water system

Activity statusActive

Population served52

Service connections3

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyCA state drinking water program

City served—

StateCalifornia

ZIP—

CountyYolo County

How does Grassland Park Host Well (Old Yolo Bowme compare with other water systems in Yolo County?

By EPA's size categories, Grassland Park Host Well (Old Yolo Bowme is a very small system (500 people or fewer). Yolo County has 88 active public water systems. Its population served is well below the county average of 2,951 people per system, and accounts for less than 0.1% of the 259,714 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Grassland Park Host Well (Old Yolo Bowme is about 64% below that figure.

What does “transient non-community water system” mean?

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. California has 3,016 active transient non-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 Grassland Park Host Well (Old Yolo Bowme?

EPA lists Grassland Park Host Well (Old Yolo Bowme as privately owned. 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. 69 of the 88 active systems in Yolo County (78%) are also privately owned.

Does Grassland Park Host Well (Old Yolo Bowme have drinking water violations?

EPA's records list 7 violations for this system; 5 are health-based, and the most recent began in October 2019. The violations listed here began between August 2005 and October 2019. By type: 5 contaminant level above the legal limit and 2 monitoring. The contaminant or rule involved most often is Nitrate (5 of them). EPA lists 7 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
2019-10-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2019-01-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2018-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Nitratecode 1040	Yes	Resolved
2016-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Nitratecode 1040	Yes	Resolved
2014-05-27	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Nitratecode 1040	Yes	Resolved
2008-09-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Nitratecode 1040	Yes	Resolved
2005-08-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Nitratecode 1040	Yes	Resolved

All 7 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.

Grassland Park Host Well (Old Yolo Bowme: frequently asked questions

Who runs Grassland Park Host Well (Old Yolo Bowme?

Grassland Park Host Well (Old Yolo Bowme (PWSID CA5700757) is a transient non-community water system privately owned. It is regulated by the CA state drinking water program.

How many people does Grassland Park Host Well (Old Yolo Bowme serve?

Grassland Park Host Well (Old Yolo Bowme reports serving 52 people through 3 service connections in Yolo County, California.

Where does Grassland Park Host Well (Old Yolo Bowme 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 Grassland Park Host Well (Old Yolo Bowme have any drinking water violations?

EPA's records list 7 violations for this system; 5 are health-based, and the most recent began in October 2019. 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 Grassland Park Host Well (Old Yolo Bowme'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 7 violations for this system; 5 are health-based, and the most recent began in October 2019. For current results, consult EPA ECHO, or the CA state drinking water program.

Where can I find Grassland Park Host Well (Old Yolo Bowme's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Grassland Park Host Well (Old Yolo Bowme is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.

Other water systems in Yolo County

Water system	County	Population served	Type	Source
City of Davis	Yolo	67,457	Community	Purchased surface water
City of Woodland	Yolo	61,462	Community	Purchased surface water
City of West Sacramento	Yolo	53,355	Community	Surface water
Uc - Davis	Yolo	49,616	Community	Purchased surface water
City of Winters	Yolo	7,115	Community	Groundwater
Esparto C.S.D.	Yolo	3,574	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, “Grassland Park Host Well (Old Yolo Bowme, PWSID CA5700757, California”, https://aquacensus.com/water-systems/california/grassland-park-host-well-old-yolo-bowme-ca5700757 (data as of October 1, 2026).