ATHERTON, CA · San Mateo County
MENLO COLLEGE Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of August 3, 2015. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.
If you are a resident looking for your current water provider, see water systems in San Mateo County, CA.
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)
- CA4100517
- System type
- Community Water System
- Population served
- 850
- Service connections
- 15
- Ownership
- privately owned
- Water source
- groundwater (wells)
Violation history
Monitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
July 1, 2007 – September 30, 2007
ResolvedFollow-up Or Routine LCR Tap M/R
—Lead and Copper Rule
January 1, 2005 – August 3, 2015
ArchivedMonitoring, Regular
—Styrene
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Benzo(a)pyrene
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Hexachlorocyclopentadiene
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—2,3,7,8-TCDD
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—OXAMYL
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Endothall
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Pentachlorophenol
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Atrazine
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—2,4,5-TP
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Simazine
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Di(2-ethylhexyl) phthalate
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—BHC-GAMMA
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Chlordane
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Endrin
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Toxaphene
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Heptachlor
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Heptachlor epoxide
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Methoxychlor
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Total Polychlorinated Biphenyls (PCB)
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—HEXACHLOROBENZENE
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Picloram
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—2,4-D
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—LASSO
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Dinoseb
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Carbofuran
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Di(2-ethylhexyl) adipate
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Combined Uranium
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—Mercury
January 1, 2004 – December 31, 2004
ArchivedMonitoring, Regular
—DICHLOROMETHANE
January 1, 2004 – December 31, 2004
ArchivedNotification, Public
—No contaminant on record
October 1, 1982 – October 31, 1982
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
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| July 1, 2007 – September 30, 2007 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| January 1, 2005 – August 3, 2015 | Follow-up Or Routine LCR Tap M/R | Lead and Copper Rule | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Styrene | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Benzo(a)pyrene | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Hexachlorocyclopentadiene | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | 2,3,7,8-TCDD | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | 1,2-DIBROMO-3-CHLOROPROPANE | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | OXAMYL | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Endothall | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Pentachlorophenol | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Atrazine | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | 2,4,5-TP | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Simazine | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Di(2-ethylhexyl) phthalate | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | BHC-GAMMA | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Chlordane | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Endrin | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Toxaphene | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Heptachlor | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Heptachlor epoxide | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Methoxychlor | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Total Polychlorinated Biphenyls (PCB) | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | HEXACHLOROBENZENE | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Picloram | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | 2,4-D | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | LASSO | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Dinoseb | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Carbofuran | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Di(2-ethylhexyl) adipate | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Combined Uranium | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | Mercury | — | Archived |
| January 1, 2004 – December 31, 2004 | Monitoring, Regular | DICHLOROMETHANE | — | Archived |
| October 1, 1982 – October 31, 1982 | 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 |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- September 19, 2003State Violation/Reminder Notice57 linked violations
Last known contact on file (system is inactive)
TALBOT, BOB
650-543-3714
ATHERTON, CA 94027