Water Quality: San Ysidro, NM
1 water system • 166 people served
Multiple Health ViolationsWater Quality Summary
San Ysidro is served by 1 public water system with a combined service population of 166 people, and has 189 EPA Safe Drinking Water Act violations on record. Critically, 102 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. San Ysidro's violation count is 12% above the national average for New Mexico. Contaminants associated with violations include Barium, Chlorine, Chlorine Dioxide, Lead, Stage 2 DBP.
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
Eye and nose irritation at high levels; long-term exposure above the MCL may cause liver and kidney damage.
Common source: Water treatment disinfectant added to kill harmful microorganisms
EPA limit: 4.0 mg/L (MRDL — Maximum Residual Disinfectant Level)
Can cause anemia in infants and young children; may cause nervous system effects at high levels.
Common source: Water treatment disinfectant used to control taste, odor, and microorganisms
EPA limit: 0.8 mg/L
Causes neurological damage, developmental delays in children, and kidney damage in adults even at low exposure levels.
Common source: Old plumbing pipes, lead solder, brass fixtures
EPA limit: Action Level: 0.015 mg/L (15 ppb)
Trihalomethanes and haloacetic acids that increase cancer risk and may cause adverse reproductive outcomes.
Common source: Chlorine disinfection reacting with natural organic matter in source water
EPA limit: TTHM: 0.080 mg/L; HAA5: 0.060 mg/L
Water Systems Serving San Ysidro
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| SAN YSIDRO WATER SUPPLY SYSTEM | NM3509723 | Groundwater | 166 | 189 |
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 New Mexico
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.