MADISON, CA · Yolo County
MADISON SERVICE DIST Water System
Consumer Confidence Report status
MADISON SERVICE DIST must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for MADISON SERVICE DIST.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace California’s official records. Always confirm current status with California before making decisions based on this information.
System facts
- System ID (PWSID)
- CA5700571
- System type
- Community Water System
- Population served
- 876
- Service connections
- 149
- Ownership
- local government
- Water source
- groundwater (wells)
MADISON SERVICE DIST is one of 728 community water systems in California in the 501 to 3,300 people size category, serving 876 people from groundwater.
As of August 1, 2026, its federal record holds 16 entries between 1980 and 2025, all of which EPA lists as closed.
Of the 16, 12 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves synthetic organic chemicals, the Miscellaneous Other Rules, and volatile organic chemicals.
Violation history
Monitoring, Regular
—Pentachlorophenol
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—Heptachlor epoxide
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—1,2-Dichloroethane
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—LASSO
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—Hexachlorocyclopentadiene
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—1,2-Dichloropropane
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—Atrazine
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Benzene
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Simazine
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Barium
January 1, 2023 – December 31, 2025
ArchivedNotification, Public
—No contaminant on record
September 1, 1984 – September 30, 1984
ArchivedNotification, Public
—No contaminant on record
August 1, 1984 – August 31, 1984
ArchivedNotification, Public
—No contaminant on record
July 1, 1984 – July 31, 1984
ArchivedNotification, Public
—No contaminant on record
April 1, 1983 – April 30, 1983
ArchivedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
October 1, 1981 – September 30, 1982
ArchivedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
October 30, 1980 – October 29, 1981
Archived
Archived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | Pentachlorophenol | — | Archived |
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | Heptachlor epoxide | — | Archived |
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | 1,2-Dichloroethane | — | Archived |
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | LASSO | — | Archived |
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | Hexachlorocyclopentadiene | — | Archived |
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | 1,2-Dichloropropane | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Atrazine | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Benzene | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Simazine | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Barium | — | Archived |
| September 1, 1984 – September 30, 1984 | Notification, Public | — | — | Archived |
| August 1, 1984 – August 31, 1984 | Notification, Public | — | — | Archived |
| July 1, 1984 – July 31, 1984 | Notification, Public | — | — | Archived |
| April 1, 1983 – April 30, 1983 | Notification, Public | — | — | Archived |
| October 1, 1981 – September 30, 1982 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
| October 30, 1980 – October 29, 1981 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
Archived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- January 17, 2020State Compliance achieved81 linked violations
- July 23, 2018State Compliance achieved45 linked violations
- March 18, 2015State Compliance achieved3 linked violations
- December 10, 2002State Public Notification requested4 linked violations
- December 2, 2002State Public Notification requested3 linked violations
- September 1, 2002State Compliance achieved3 linked violations
Common questions
Is MADISON SERVICE DIST required to publish a Consumer Confidence Report?
- Yes. MADISON SERVICE DIST is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is MADISON SERVICE DIST’s next Consumer Confidence Report due?
- MADISON SERVICE DIST’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MADISON SERVICE DIST have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for MADISON SERVICE DIST.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
_REFSLAND, LEO
530-383-4049
MADISON, CA 95653