States › New Hampshire › Carroll County

Carroll County, NH Water Quality

Water quality data for 15 public water systems serving Carroll County, New Hampshire — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 15 water systems · 15 cities
⚠️
Caution Advised — Some Systems Need Attention

Some systems have elevated lead levels or active violations. Check your specific city below.

C

Carroll County Earns a C

Carroll County: 15 communities across 15 water systems. 100.0% have no open violations.

  • Median lead where detected: 27.00 ppb
  • 11 communities with a lead detection, 0 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 3 with significant inspection deficiencies
  • 100.0% of communities have no open violations
27 ppb
Median Lead Level
County-wide, 90th percentile
15
Water Systems
Active CWS & NTNCWS
100%
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
  • Wolfeboro
    2.00 ppb
    No federal limits exceeded on record
    A
  • Brookfield
    Not reported
    2 health-based violations since 2015
    B
  • Conway
    1.00 ppb
    Copper above the 1,300 ppb action level
    A
  • Bartlett
    1.00 ppb
    Copper above the 1,300 ppb action level
    A
  • Effingham
    Not reported
    1 significant inspection deficiency
    B
⚠ Needs Attention
  • Tamworth
    23.00 ppb
    Lead above the 15 ppb action level
    D
  • Jackson
    35.00 ppb
    Lead above the 15 ppb action level
    D
  • Tuftonboro
    37.00 ppb
    Lead above the 15 ppb action level
    D
  • Wakefield
    30.00 ppb
    Lead above the 15 ppb action level
    D
  • Moultonborough
    37.00 ppb
    Lead above the 15 ppb action level
    D
County Lead Level — Median 27 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 27 ppb — 180% of the federal action level
Systems by Lead Level
Under 5 ppb
3
10 – 15 ppb
8
No Data
4

All Cities in Carroll County

Wolfeboro 2.00 ppb A
Conway 1.00 ppb A
Bartlett 1.00 ppb A
Ossipee 19.00 ppb C
Wakefield 30.00 ppb D
Jackson 35.00 ppb D
Madison Not reported C
Moultonborough 37.00 ppb D
Tamworth 23.00 ppb D
Freedom 27.00 ppb C
Effingham Not reported B
Tuftonboro 37.00 ppb D
Albany Not reported B
Brookfield Not reported B
Hart's Location 31.00 ppb C
Showing 15 cities
No active violations Active violations

About Carroll County Drinking Water

Carroll County is served by 15 water systems covering 15 communities. No community here has an open violation on record.

Of the communities reporting lead results, 11 recorded a detection, with a median of 27.00 ppb — 180% of the federal action level. 0 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 3 of them.

Frequently Asked Questions

Is Carroll County tap water safe to drink?▼
No community in Carroll County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Carroll County?▼
Among communities with a detection the median is 27.00 ppb, 180% of the 15 ppb action level. 0 reported none detected and 4 reported no result.
How many water systems serve Carroll County?▼
15 community water systems serve 15 communities here.
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