Public water system record
Oku Incorporated
Serves Pescadero, San Mateo County, CA · 35 people served
Federal records show no health-based violations and 39 monitoring/reporting issues for Oku Incorporated in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 39
Key facts
- Oku Incorporated draws water from 1 well.
- Most recent formal enforcement: compliance order (no penalty) by California, May 2022.
- Record on file since 1996, with 4 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 10 service lines.
Check whether Oku Incorporated serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2025 | Active |
|
Radium-228
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
Radium-228
Monitoring and reporting
|
Apr 1, 2021 | Resolved |
|
Radium-228
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Styrene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Toluene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Benzene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Selenium
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Thallium, Total
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Beryllium, Total
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Antimony, Total
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Nitrite
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Nickel
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Mercury
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Fluoride
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Chromium (total)
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Cadmium
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Barium
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2003 | Resolved |
Full record since 1996
EPA's records for Oku Incorporated go back to 1996. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 0 |
| 2000s | 0 | 4 |
| 2010 to October 18, 2016 | 3 | 0 |
| October 19, 2016 to 2019 | 0 | 34 |
| 2020s | 0 | 4 |
Most recent health-based violation before October 19, 2016: Haloacetic Acids (HAA5), began July 2011, Resolved.
Show all 4 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.15 mg/L, federal limit 0.06 mg/L (2.5 times the limit)
|
Jul 1, 2011 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.115 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
|
Jul 1, 2011 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Oct 1, 2010 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Feb 1, 1996 | Resolved |
Enforcement actions
California regulators took 4 formal enforcement actions against Oku Incorporated between 2003 and 2022. The most recent was a compliance order (no penalty) in May 2022.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 26, 2022 | California | Compliance order (no penalty) | 36 violations: Chromium (total), Mercury, Nickel, Thallium, Total, cis-1,2-Dichloroethylene |
| Feb 27, 2018 | California | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
| Nov 15, 2010 | California | Compliance order (no penalty) | 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule |
| Dec 31, 2003 | California | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
Where the water comes from
Oku Incorporated draws water from 1 well.
Annual water quality report
Oku Incorporated must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Oku Incorporated for a copy.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by California.
Certified drinking water labs by state EPA guidance for private wells