Hilo
Published drinking-water records and contacts for Hilo. System HI0000101. Review sources and dates; not a real-time water assessment.
- System ID
- HI0000101
- State or territory
- HI
- Published population served
- 39477
- System type (source code)
- CWS
Published records and dates
- PFAS / lithium (EPA UCMR 5): 300 — 2024-04-08 – 2024-10-16
- Lead and copper monitoring summaries: 12 — 1992-07-01 – 2022-12-31
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 | 2024-10-16 | UH Hilo Well Chlorinator / 101029 |
| 4:2 FTS | < 0.003 µg/L | 0.003 µg/L | 2024-10-16 | Saddle Road Well A / 101026 |
| 6:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2024-10-16 | Piihonua Well A & B (4306-01) / 101018 |
| 8:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2024-10-16 | Saddle Road Well A / 101026 |
| 9Cl-PF3ONS | < 0.002 µg/L | 0.002 µg/L | 2024-10-16 | Panaewa Wells 1, 2 & 3 Blend / 101012 |
| ADONA | < 0.003 µg/L | 0.003 µg/L | 2024-10-16 | Piihonua Well C / 101024 |
| HFPO-DA | < 0.005 µg/L | 0.005 µg/L | 2024-10-16 | Saddle Road Well A / 101026 |
| NEtFOSAA | < 0.005 µg/L | 0.005 µg/L | 2024-10-16 | Piihonua Well C / 101024 |
| NFDHA | < 0.02 µg/L | 0.02 µg/L | 2024-10-16 | Piihonua Well A & B (4306-01) / 101018 |
| NMeFOSAA | < 0.006 µg/L | 0.006 µg/L | 2024-10-16 | Piihonua Well C / 101024 |
| PFBA | < 0.005 µg/L | 0.005 µg/L | 2024-10-16 | Piihonua Well A & B (4306-01) / 101018 |
| PFBS | < 0.003 µg/L | 0.003 µg/L | 2024-10-16 | Saddle Road Well A / 101026 |
| PFDA | < 0.003 µg/L | 0.003 µg/L | 2024-10-16 | Panaewa Wells 1, 2 & 3 Blend / 101012 |
| PFDoA | < 0.003 µg/L | 0.003 µg/L | 2024-10-16 | Piihonua Well A & B (4306-01) / 101018 |
| PFEESA | < 0.003 µg/L | 0.003 µg/L | 2024-10-16 | Panaewa Wells 1, 2 & 3 Blend / 101012 |
| PFHpA | < 0.003 µg/L | 0.003 µg/L | 2024-10-16 | Panaewa Wells 1, 2 & 3 Blend / 101012 |
| PFHpS | < 0.003 µg/L | 0.003 µg/L | 2024-10-16 | Piihonua Well A & B (4306-01) / 101018 |
| PFHxA | < 0.003 µg/L | 0.003 µg/L | 2024-10-16 | Piihonua Well A & B (4306-01) / 101018 |
| PFHxS | < 0.003 µg/L | 0.003 µg/L | 2024-10-16 | Piihonua Well A & B (4306-01) / 101018 |
| PFMBA | < 0.003 µg/L | 0.003 µg/L | 2024-10-16 | Piihonua Well C / 101024 |
| PFMPA | < 0.004 µg/L | 0.004 µg/L | 2024-10-16 | UH Hilo Well Chlorinator / 101029 |
| PFNA | < 0.004 µg/L | 0.004 µg/L | 2024-10-16 | UH Hilo Well Chlorinator / 101029 |
| PFOA | < 0.004 µg/L | 0.004 µg/L | 2024-10-16 | Panaewa Wells 1, 2 & 3 Blend / 101012 |
| PFOS | < 0.004 µg/L | 0.004 µg/L | 2024-10-16 | Panaewa Wells 1, 2 & 3 Blend / 101012 |
| PFPeA | < 0.003 µg/L | 0.003 µg/L | 2024-10-16 | Saddle Road Well A / 101026 |
| PFPeS | < 0.004 µg/L | 0.004 µg/L | 2024-10-16 | Piihonua Well A & B (4306-01) / 101018 |
| PFTA | < 0.008 µg/L | 0.008 µg/L | 2024-10-16 | Saddle Road Well A / 101026 |
| PFTrDA | < 0.007 µg/L | 0.007 µg/L | 2024-10-16 | Saddle Road Well A / 101026 |
| PFUnA | < 0.002 µg/L | 0.002 µg/L | 2024-10-16 | Piihonua Well C / 101024 |
| lithium | < 9 µg/L | 9 µg/L | 2024-10-16 | UH Hilo Well Chlorinator / 101029 |
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 | 2020-01-01 – 2022-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2017-01-01 – 2019-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2014-01-01 – 2016-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2011-01-01 – 2013-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2008-01-01 – 2010-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2005-01-01 – 2007-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2002-01-01 – 2004-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2002-01-01 – 2004-12-31 | 2026Q3 |
Published compliance history
46 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 |
|---|---|---|---|---|
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1999-12-01 – 1999-12-31 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1999-11-01 – 1999-11-30 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1999-10-01 – 1999-10-31 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1999-09-01 – 1999-09-30 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1999-08-01 – 1999-08-31 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1999-07-01 – 1999-07-31 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1999-06-01 – 1999-06-30 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1999-05-01 – 1999-05-31 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1999-04-01 – 1999-04-30 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1999-03-01 – 1999-03-31 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1999-02-01 – 1999-02-28 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1999-01-01 – 1999-01-31 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1998-12-01 – 1998-12-31 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1998-11-01 – 1998-11-30 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1998-10-01 – 1998-10-31 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1998-09-01 – 1998-09-30 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1998-08-01 – 1998-08-31 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1998-07-01 – 1998-07-31 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1998-06-01 – 1998-06-30 | Archived | Yes | 2026Q3 |
| Surface Water Treatment Rule / Treatment Technique (SWTR and GWR) | 1998-05-01 – 1998-05-31 | Archived | Yes | 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
Administrative contact (EPA filing)
Okamoto, Keith K.: 808-961-8050
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.