MADISON, CA · Yolo County
MADISON SERVICE DIST Water System
Current status
No open violations on record as of July 4, 2026.
This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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)
Violation history
Monitoring, Regular
—Atrazine
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—Diquat
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—CHLOROBENZENE
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—Benzene
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—Heptachlor epoxide
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—LASSO
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—Carbon tetrachloride
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Regular
—Pentachlorophenol
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—OXAMYL
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—1,2-Dichloropropane
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—CHLOROBENZENE
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Endothall
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Di(2-ethylhexyl) phthalate
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Hexachlorocyclopentadiene
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 | Atrazine | — | Archived |
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | Diquat | — | Archived |
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | CHLOROBENZENE | — | Archived |
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | Benzene | — | Archived |
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | Heptachlor epoxide | — | Archived |
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | LASSO | — | Archived |
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | Carbon tetrachloride | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Pentachlorophenol | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | OXAMYL | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | 1,2-Dichloropropane | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | CHLOROBENZENE | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Endothall | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Di(2-ethylhexyl) phthalate | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Hexachlorocyclopentadiene | — | 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
- May 4, 2018State Administrative/Compliance Order without penalty issued195 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
- September 1, 2002State Technical Assistance Visit3 linked violations
- March 16, 1998State Technical Assistance Visit231 linked violations
Contact
_REFSLAND, LEO
530-383-4049
MADISON, CA 95653