Sonoma State University
Published drinking-water records and contacts for Sonoma State University. System CA4910027. Review sources and dates; not a real-time water assessment.
- System ID
- CA4910027
- State or territory
- CA
- Published population served
- 10986
- System type (source code)
- CWS
Published records and dates
- PFAS / lithium (EPA UCMR 5): 56 — 2023-12-05 – 2024-06-04
- Lead and copper monitoring summaries: 37 — 1993-01-01 – 2024-12-31
- California DDW laboratory results: 280 — 2026-01-06 – 2026-06-30
Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.
Published testing results
Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.
“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example
| Substance | Published result | Reporting limit | Sample date | Sampling location |
|---|---|---|---|---|
| 11Cl-PF3OUdS | < 0.005 µg/L | 0.005 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| 4:2 FTS | < 0.003 µg/L | 0.003 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| 6:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| 8:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| 9Cl-PF3ONS | < 0.002 µg/L | 0.002 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| ADONA | < 0.003 µg/L | 0.003 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| HFPO-DA | < 0.005 µg/L | 0.005 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| NEtFOSAA | < 0.005 µg/L | 0.005 µg/L | 2023-12-05 | Sonoma State University / PUMPHOUSE |
| NFDHA | < 0.02 µg/L | 0.02 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| NMeFOSAA | < 0.006 µg/L | 0.006 µg/L | 2023-12-05 | Sonoma State University / PUMPHOUSE |
| PFBA | < 0.005 µg/L | 0.005 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFBS | < 0.003 µg/L | 0.003 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFDA | < 0.003 µg/L | 0.003 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFDoA | < 0.003 µg/L | 0.003 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFEESA | < 0.003 µg/L | 0.003 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFHpA | < 0.003 µg/L | 0.003 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFHpS | < 0.003 µg/L | 0.003 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFHxA | < 0.003 µg/L | 0.003 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFHxS | < 0.003 µg/L | 0.003 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFMBA | < 0.003 µg/L | 0.003 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFMPA | < 0.004 µg/L | 0.004 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFNA | < 0.004 µg/L | 0.004 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFOA | < 0.004 µg/L | 0.004 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFOS | < 0.004 µg/L | 0.004 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFPeA | < 0.003 µg/L | 0.003 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFPeS | < 0.004 µg/L | 0.004 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| PFTA | < 0.008 µg/L | 0.008 µg/L | 2023-12-05 | Sonoma State University / PUMPHOUSE |
| PFTrDA | < 0.007 µg/L | 0.007 µg/L | 2023-12-05 | Sonoma State University / PUMPHOUSE |
| PFUnA | < 0.002 µg/L | 0.002 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
| lithium | 11 µg/L | 9 µg/L | 2024-06-04 | Sonoma State University / PUMPHOUSE |
Download all EPA UCMR 5 records (CSV)
Lead and copper: 90th-percentile summaries
These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile
| Substance | Published 90th percentile | Monitoring period | Source quarter |
|---|---|---|---|
| Lead (PB90) | 0 mg/L | 2022-01-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0.0061 mg/L | 2019-01-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2018-01-01 – 2020-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2012-01-01 – 2014-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2010-01-01 – 2012-12-31 | 2026Q3 |
| Lead (PB90) | 0.0025 mg/L | 2007-01-01 – 2009-12-31 | 2026Q3 |
| Lead (PB90) | 0.0025 mg/L | 2008-01-01 – 2008-12-31 | 2026Q3 |
| Lead (PB90) | 0.0025 mg/L | 2004-01-01 – 2006-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| NITRITE | < 0.200000000 MG/L | 2026-06-30 | WELL 03 / California DDW laboratory results |
| NITRATE | 6.4 MG/L | 2026-06-30 | WELL 03 / California DDW laboratory results |
| NITRATE-NITRITE | 6.3 MG/L | 2026-06-30 | WELL 03 / California DDW laboratory results |
| NITRITE | < 0.200000000 MG/L | 2026-06-30 | WELL 04 / California DDW laboratory results |
| NITRATE-NITRITE | 5.9 MG/L | 2026-06-30 | WELL 04 / California DDW laboratory results |
| NITRATE | 5.9 MG/L | 2026-06-30 | WELL 04 / California DDW laboratory results |
| PERFLUORO PFMBA | < 2.000000000 NG/L | 2026-06-17 | WELL 02A / California DDW laboratory results |
| PERFLUOROHEXANE SULFONIC ACID (PFHxS) | < 2.000000000 NG/L | 2026-06-17 | WELL 02A / California DDW laboratory results |
| PERFLUORODODECANOIC ACID (PFDOA) | < 2.000000000 NG/L | 2026-06-17 | WELL 04 / California DDW laboratory results |
| 11CL-PF3OUDS | < 2.000000000 NG/L | 2026-06-17 | WELL 04 / California DDW laboratory results |
| PERFLUOROHEXANOIC ACID (PFHXA) | < 2.000000000 NG/L | 2026-06-17 | WELL 03 / California DDW laboratory results |
| 9CL-PF3ONS | < 2.000000000 NG/L | 2026-06-17 | WELL 04 / California DDW laboratory results |
State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.
Download state records with source notes (CSV)
Published compliance history
5 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.
| Rule / record | Period | Recorded status | Health-based (EPA classification) | Source quarter |
|---|---|---|---|---|
| Lead and Copper Rule / Follow-up Or Routine LCR Tap M/R | 2017-10-01 – — | Resolved | No | 2026Q3 |
| Ground Water Rule / Treatment Technique (SWTR and GWR) | 2017-05-01 – 2017-05-31 | Resolved | Yes | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1989-08-01 – 1989-08-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1989-02-01 – 1989-02-28 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1987-06-01 – 1987-06-30 | Archived | No | 2026Q3 |
Source dates and refresh checks
A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.
- EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
- EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
- EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17
- California DDW laboratory results — last successful check: 2026-10-17
Administrative contact (EPA filing)
Brunetta, Missy: 707-664-3408
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.