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Grant County, NM Water Quality

Water quality data for 13 public water systems serving Grant County, New Mexico — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 13 water systems · 15 cities
✅
Generally Safe — Most Systems Performing Well

The majority of water systems have no active violations and lead levels well below the federal action level.

B

Grant County Earns a B

Grant County: 15 communities across 13 water systems. 86.7% have no open violations.

  • Median lead where detected: 1.00 ppb
  • 13 communities with a lead detection, 2 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 5 with significant inspection deficiencies
  • 86.7% of communities have no open violations
1 ppb
Median Lead Level
County-wide, 90th percentile
13
Water Systems
Active CWS & NTNCWS
86%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Silver City
    0.80 ppb
    No federal limits exceeded on record
    A
  • Bayard
    2.10 ppb
    No federal limits exceeded on record
    B
  • Little Walnut Village
    0.80 ppb
    No federal limits exceeded on record
    A
  • Hurley
    0.57 ppb
    No federal limits exceeded on record
    B
  • Arenas Valley
    1.40 ppb
    No federal limits exceeded on record
    B
⚠ Needs Attention
  • San Lorenzo
    Not detected
    Copper above the 1,300 ppb action level
    F
  • Casas Adobes
    Not detected
    Copper above the 1,300 ppb action level
    F
  • Hanover
    12.00 ppb
    3 significant inspection deficiencies
    D
  • Mimbres
    6.00 ppb
    3 significant inspection deficiencies
    C
  • Hachita
    0.90 ppb
    1 significant inspection deficiency
    C
County Lead Level — Median 1 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1 ppb — 6.7% of the federal action level
Systems by Lead Level
Under 5 ppb
11
5 – 10 ppb
1
10 – 15 ppb
1
No Data
2

All Cities in Grant County

Silver City 0.80 ppb A
Bayard 2.10 ppb B
Santa Clara 1.80 ppb B
Little Walnut Village 0.80 ppb A
Hurley 0.57 ppb B
Arenas Valley 1.40 ppb B
Tyrone 0.67 ppb B
Rosedale 1.00 ppb B
Casas Adobes Not detected F
North Hurley 0.85 ppb B
Pinos Altos 1.60 ppb B
Hanover 12.00 ppb D
Mimbres 6.00 ppb C
Hachita 0.90 ppb C
San Lorenzo Not detected F
Showing 15 cities
No active violations Active violations

About Grant County Drinking Water

Grant County is served by 13 water systems covering 15 communities. 87% have no open violations.

Of the communities reporting lead results, 13 recorded a detection, with a median of 1.00 ppb — 7% of the federal action level. 2 reported none detected, which means below the laboratory limit rather than an absence of lead.

No community here has PFAS above the federal limit on record. State inspectors recorded significant deficiencies at 5 of them.

Frequently Asked Questions

Is Grant County tap water safe to drink?▼
87% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Grant County?▼
Among communities with a detection the median is 1.00 ppb, 7% of the 15 ppb action level. 2 reported none detected and 0 reported no result.
How many water systems serve Grant County?▼
13 community water systems serve 15 communities here.
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