An independent public resourceEnglish Español
PublicWater Watch

City of Ukiah

Published drinking-water records and contacts for City of Ukiah. System CA2310003. Review sources and dates; not a real-time water assessment.

System ID
CA2310003
State or territory
CA
Published population served
16607
System type (source code)
CWS

Published records and dates

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

EPA UCMR 5 — most recent imported sample per substance
SubstancePublished resultReporting limitSample dateSampling location
11Cl-PF3OUdS< 0.005 µg/L0.005 µg/L2024-08-01Ranney Collector TP / 2310003805
4:2 FTS< 0.003 µg/L0.003 µg/L2024-08-01Well 3 TP / 2310003804
6:2 FTS< 0.005 µg/L0.005 µg/L2024-08-01Well 3 TP / 2310003804
8:2 FTS< 0.005 µg/L0.005 µg/L2024-08-01Ranney Collector TP / 2310003805
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2024-08-01Ranney Collector TP / 2310003805
ADONA< 0.003 µg/L0.003 µg/L2024-08-01Ranney Collector TP / 2310003805
HFPO-DA< 0.005 µg/L0.005 µg/L2024-08-01Well 3 TP / 2310003804
NEtFOSAA< 0.005 µg/L0.005 µg/L2023-10-18Ranney Collector TP / 2310003805
NFDHA< 0.02 µg/L0.02 µg/L2024-08-01Well 3 TP / 2310003804
NMeFOSAA< 0.006 µg/L0.006 µg/L2023-10-18Well 3 TP / 2310003804
PFBA< 0.005 µg/L0.005 µg/L2024-08-01Well 3 TP / 2310003804
PFBS< 0.003 µg/L0.003 µg/L2024-08-01Ranney Collector TP / 2310003805
PFDA< 0.003 µg/L0.003 µg/L2024-08-01Well 3 TP / 2310003804
PFDoA< 0.003 µg/L0.003 µg/L2024-08-01Ranney Collector TP / 2310003805
PFEESA< 0.003 µg/L0.003 µg/L2024-08-01Well 3 TP / 2310003804
PFHpA< 0.003 µg/L0.003 µg/L2024-08-01Ranney Collector TP / 2310003805
PFHpS< 0.003 µg/L0.003 µg/L2024-08-01Well 3 TP / 2310003804
PFHxA< 0.003 µg/L0.003 µg/L2024-08-01Well 3 TP / 2310003804
PFHxS< 0.003 µg/L0.003 µg/L2024-08-01Ranney Collector TP / 2310003805
PFMBA< 0.003 µg/L0.003 µg/L2024-08-01Ranney Collector TP / 2310003805
PFMPA< 0.004 µg/L0.004 µg/L2024-08-01Well 3 TP / 2310003804
PFNA< 0.004 µg/L0.004 µg/L2024-08-01Well 3 TP / 2310003804
PFOA< 0.004 µg/L0.004 µg/L2024-08-01Ranney Collector TP / 2310003805
PFOS< 0.004 µg/L0.004 µg/L2024-08-01Well 3 TP / 2310003804
PFPeA< 0.003 µg/L0.003 µg/L2024-08-01Ranney Collector TP / 2310003805
PFPeS< 0.004 µg/L0.004 µg/L2024-08-01Well 3 TP / 2310003804
PFTA< 0.008 µg/L0.008 µg/L2023-10-18Well 3 TP / 2310003804
PFTrDA< 0.007 µg/L0.007 µg/L2023-10-18Well 3 TP / 2310003804
PFUnA< 0.002 µg/L0.002 µg/L2024-08-01Ranney Collector TP / 2310003805
lithium< 9 µg/L9 µg/L2023-10-18Ranney Collector TP / 2310003805

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

Eight most recent imported monitoring summaries
SubstancePublished 90th percentileMonitoring periodSource quarter
Lead (PB90) 0 mg/L2024-01-01 – 2026-12-312026Q3
Lead (PB90) 0 mg/L2023-07-01 – 2023-12-312026Q3
Lead (PB90) 0 mg/L2020-01-01 – 2022-12-312026Q3
Lead (PB90) 0 mg/L2017-01-01 – 2019-12-312026Q3
Lead (PB90) 0.0062 mg/L2014-01-01 – 2016-12-312026Q3
Lead (PB90) 0.0028 mg/L2011-01-01 – 2013-12-312026Q3
Lead (PB90) 0.0059 mg/L2008-01-01 – 2010-12-312026Q3
Lead (PB90) 0.0069 mg/L2007-01-01 – 2007-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
2,3,7,8-TCDD< 0.005000000 NG/L2026-06-09RANNEY COLLECTOR / California DDW laboratory results
9CL-PF3ONS< 2.000000000 NG/L2026-04-28WELL 03 / California DDW laboratory results
PERFLUORO PFMBA< 2.000000000 NG/L2026-04-28WELL 03 / California DDW laboratory results
DI(2-ETHYLHEXYL) PHTHALATE< 3.000000000 UG/L2026-04-28WELL 03 / California DDW laboratory results
NITRATE1.5 MG/L2026-04-28WELL 08 / California DDW laboratory results
DI(2-ETHYLHEXYL) ADIPATE< 5.000000000 UG/L2026-04-28WELL 03 / California DDW laboratory results
NITRATE-NITRITE1.5 MG/L2026-04-28WELL 08 / California DDW laboratory results
THIOBENCARB (BOLERO)< 1.000000000 UG/L2026-04-28WELL 03 / California DDW laboratory results
PERFLUOROHEPTANESULFONIC ACID (PFHPS)< 2.000000000 NG/L2026-04-28WELL 03 / California DDW laboratory results
PERFLUOROHEXANOIC ACID (PFHXA)< 2.000000000 NG/L2026-04-28WELL 03 / California DDW laboratory results
PERFLUOROOCTANE SULFONIC ACID 6:2 FTS< 2.000000000 NG/L2026-04-28WELL 03 / California DDW laboratory results
PERFLUOROCTANOIC ACID (PFOA)< 2.000000000 NG/L2026-04-28WELL 03 / 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

2 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.

Twenty most recent imported compliance records
Rule / recordPeriodRecorded statusHealth-based (EPA classification)Source quarter
Lead and Copper Rule / Follow-up Or Routine LCR Tap M/R2022-10-01 – —UnaddressedNo2026Q3
Miscellaneous Other Rules / Notification, Public1986-05-01 – 1986-05-31ArchivedNo2026Q3

Source dates and refresh checks

A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.

Administrative contact (EPA filing)

Walker, Jared: 707-462-2666

An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.

Official state resources · How to read these records