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Water system · PWSID NM3509723

SAN YSIDRO WATER SUPPLY SYSTEM

SAN YSIDRO, NM · ~166 people served

Check your exact address → SAN YSIDRO overview
100
Excellent
PurityRadar safety score

PWSID

NM3509723

State

New Mexico

City

SAN YSIDRO

Population served

166

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

105

Violations on record

4

Unaddressed

40

Health-based

173

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2025. Official EPA record →

Treatment technique · EPA contaminant 0700 health-based began Jul 2025 Unaddressed
Treatment technique · EPA contaminant 0700 health-based began Jul 2025 Unaddressed
Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed
Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed
Max contaminant level (MCL) · Fluoride health-based began Jul 2024 Resolved
Max contaminant level (MCL) · Fluoride health-based began Apr 2024 Resolved
Max contaminant level (MCL) · Fluoride health-based began Jan 2024 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Nov 2023 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Nov 2023 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2023 Resolved
Max contaminant level (MCL) · Fluoride health-based began Oct 2023 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2023 Resolved

Recent enforcement actions

  • State action · SIF Oct 2025
  • State action · SIA Sep 2025
  • State action · SIE Sep 2025
  • State action · SIF Aug 2025
  • State action · SIF Aug 2025
  • State action · SIA Jun 2025
  • State action · SIE Jun 2025
  • State action · SIE Jun 2025

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Arsenic

2 stations · latest Dec 2025

0.084 · max 0.22 mg/L · 22

Manganese

2 stations · latest Dec 2025

0.105 · max 0.57 mg/L · 22

Fluoride

1 station · latest Dec 2025

1.6 · max 5.3 mg/L · 17

Copper

1 station · latest Mar 2025

0.0011 · max 0.0096 mg/L · 11

Lead

1 station · latest Sep 2024

0.0011 · max 0.0078 mg/L · 7

Uranium

1 station · latest Jun 2021

0.001 · max 0.001 mg/L · 3

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system NM3509723 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.