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Counties → New Hampshire

Grafton County, New Hampshire

SDWIS compliance plate

Sheet NH009 · Grafton County 269 sys · 20,540 viol · #569/3254

VIOL-SEVERE · HEALTH-LOW · RANK-TOP · ABOVE-PEER · PFAS-CLEAN · SRC-GW · SYS-LARGE · BOOK-FULL

  • VIOL-SEVERE 94.4% flagged
  • HEALTH-LOW 19.4% health
  • RANK-TOP #569/3254
  • ABOVE-PEER +1.7 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 97%
  • SYS-LARGE 269 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Merrimack County ( -1.7 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Grafton County ranks #569 of 3,254 counties by people served, and #5 of 10 counties in New Hampshire. See methodology · corpus placement.

Grafton County standing, mid-flagged corpus third

Flagged-system rate 94.4% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 19.4% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #569 of 3,254 · #5 of 10 in New Hampshire.

Flagged-rate neighbourhood around Grafton County

Lowest/highest poles plus in-state counties nearest Grafton County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Sullivan · lowest Carroll · near 86.2% 90.9% 91.2% 91.7% 92.7% 94.4%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

System Name Population Violations PFAS
Lebanon Water Dept 10,050 10 Clean
Hanover Water Dept 8,500 166 Clean
Plymouth Vlg Water and Sewer 6,700 82 Clean
Littleton Water and Light 6,500 183 Clean
Bristol Water Works 3,575 20 Clean
Lincoln Water Works 3,300 63 -
Waterville Valley Water Dist 3,150 44 -
Woodstock Water Dept 2,950 28 -
Woodsville Water and Light 2,075 79 -
Bethlehem Village Dist 1,750 299 -
Ashland Water Dept 1,525 188 -
W Valley Ski Area Base Lodge 1,500 8 -
Enfield Water Dept 1,345 55 -
Waterville Estate Vlg Dist/W 1,250 139 -
Lisbon Water Dept 1,010 252 -
Fnsp Tram Summit Station 1,000 41 -
Fnsp Cannon Mtn Peabody Slope 1,000 72 -
Fnsp the Flume 1,000 41 -
Loon Mountain Camp III 999 16 -
Loon Mountain Summit Cafe 999 0 -
Fnsp Tram Valley Station 900 36 -
Littleton Rest Area 800 19 -
Dartmouth Skiway 800 50 -
Indian River Sch 799 41 -
Mountain Lakes Water District 787 271 -
No Haverhill Water and Light 750 288 -
Dunkin Donuts 700 0 -
Canaan Water Dept 684 261 -
Camp Walt Whitman 650 27 -
Campton Village Pct 600 469 -
Polar Caves 600 8 -
Precinct of Haverhill Corner 540 53 -
Franconia Village Water 535 76 -
Rockywold Camp 530 5 -
Deephaven Camp 530 5 -
Moose Hillock Campground 505 92 -
Newfound Regional Hs 500 2 -
Whaleback Mountain 500 121 -
Camp Berea/Dining Hall 500 6 -
Mittersill Water Dept 475 157 -
Camp Wicosuta 475 40 -
Walters Basin 450 44 -
Goose Hollow Travel Trailer Pk 438 41 -
Covered Bridge Farm Table 410 80 -
W Valley Ski Area Schwendi 400 14 -
Russell Pond Campground 400 12 -
Fnsp Lafayette Place Cpgd 385 43 -
Davidsons Countryside Cpgd 365 24 -
Rosebrook Lodge 350 4 -
Broken Branch KOA Campground 335 68 -

Compare beyond New Hampshire

Mid-flagged peers for Grafton County

Cross-state counties nearest Grafton County on flagged-system share (94.4%) and cumulative violation count (20,540). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.