Water Quality: Royal Oaks, CA
18 water systems • 10,349 people served
Multiple Health ViolationsWater Quality Summary
Royal Oaks is served by 18 public water systems with a combined service population of 10,349 people, and has 140 EPA Safe Drinking Water Act violations on record. Critically, 119 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Royal Oaks's violation count is 192% above the national average for California. Contaminants associated with violations include Barium, Contaminant 2414, Gross Alpha, Selenium.
Contaminants Found
Increases blood pressure and causes cardiovascular effects with long-term exposure.
Common source: Natural rock deposits, oil drilling operations, coal power plant waste
EPA limit: 2 mg/L
Alpha-emitting radioactive particles increase cancer risk, particularly from bone and other internal cancers.
Common source: Natural uranium and radium in geological formations
EPA limit: 15 pCi/L (excluding radon and uranium)
Hair loss, nail brittleness, and nervous system damage at elevated concentrations.
Common source: Natural geological deposits, mining discharges, oil refinery waste
EPA limit: 0.05 mg/L (50 ppb)
Water Systems Serving Royal Oaks
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| PSMCSD - PAJARO | CA2710020 | Groundwater | 6,500 | 0 |
| PSMCSD - NORMCO | CA2700511 | Groundwater | 928 | 0 |
| PSMCSD - SUNNY MESA | CA2700773 | Groundwater | 880 | 3 |
| PSMCSD - MOSS LANDING HARBOR WS | CA2701515 | Groundwater | 520 | 0 |
| PSMCSD - VEGA RD WS #01 | CA2700787 | Groundwater | 438 | 0 |
| PSMCSD - SPRINGFIELD WS | CA2700771 | Groundwater | 200 | 55 |
| PSMCSD - VIERRA ESTATES WS | CA2702007 | Groundwater | 164 | 5 |
| SAN MIGUEL WS #01 | CA2700738 | Groundwater | 100 | 68 |
| PSMCSD - LANGLEY/VALLE PACIFICO WS | CA2701670 | Groundwater | 81 | 1 |
| STRAWBERRY RD WS #06 | CA2700766 | Groundwater | 78 | 2 |
| MANZANITA HILLS WA | CA2700629 | Groundwater | 75 | 0 |
| PSMCSD - BLACKIE RD WS | CA2702094 | Groundwater | 60 | 0 |
| DELANY WC | CA2702110 | Groundwater | 60 | 0 |
| ROYAL OAK PLACE WS | CA2702388 | Groundwater | 60 | 1 |
| CHETMOORE ACRES WA | CA2700634 | Groundwater | 59 | 0 |
| APRICOT LN WS | CA2702026 | Groundwater | 53 | 0 |
| MAHER RD WS #05 | CA2700638 | Groundwater | 48 | 4 |
| SAN MIGUEL WS #03 | CA2700740 | Groundwater | 45 | 1 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in California
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.