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Counties → Pennsylvania

Blair County, Pennsylvania

SDWIS compliance plate

Sheet PA013 · Blair County 53 sys · 8,263 viol · #567/3254

VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-MID · BOOK-FULL

  • VIOL-SEVERE 98.1% flagged
  • HEALTH-LOW 4.9% health
  • RANK-TOP #567/3254
  • PHOTO-FINISH ±0.1 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 87%
  • SYS-MID 53 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Wayne County (+ 0.1 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Blair County ranks #567 of 3,254 counties by people served, and #26 of 68 counties in Pennsylvania. See methodology · corpus placement.

Blair County standing, mid-flagged corpus third

Flagged-system rate 98.1% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 4.9% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #567 of 3,254 · #26 of 68 in Pennsylvania.

Flagged-rate neighbourhood around Blair County

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

0% 20% 40% 60% 80% 100% Greene · lowest Snyder · near Wayne · near Sullivan · highest 66.7% 97.9% 98% 98.1% 98.2% 98.3% 100%

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

Water Systems

System Name Population Violations PFAS
Altoona Water Authority 62,500 790 Clean
Hollidaysburg Muni Auth 8,523 61 Clean
Tyrone Boro Water Auth 6,500 116 Clean
Roaring Spring Muni Water Auth 3,182 89 -
Bellwood Boro Auth 3,162 103 -
Martinsburg Muni Auth 3,160 59 -
Blair Twp Water & Sewer Auth 2,550 44 -
Greenfield Twp Muni Auth 2,500 283 -
Duncansville Muni Water Auth 2,350 135 -
Williamsburg Munic Auth 1,800 260 -
Freedom Twp Water & Sewer 1,400 20 -
Juniata Gap Elem Sch 620 80 -
Hillcrest Communities LP 350 736 -
Southern Blair Senior Center 350 23 -
Geeseytown Vol Fire Co 304 62 -
Fredericksburg Water Assn 300 206 -
Duncansville MHP LLC 250 44 -
Blair MHP 185 594 -
Sproul Water Assn 180 813 -
Henrietta Mutual Water Assn 165 86 -
Fort Roberdeau 100 63 -
Canoe Creek St Park 100 16 -
VFW Post No 8724 100 95 -
Duncansville Dollar General 100 71 -
Vail Water Assn 98 1,172 -
East Sharpsburg Water Assn 95 15 -
Westwood Park Water Co 95 63 -
Curryville Water Auth 85 471 -
Ore Hill Water Assn 80 157 -
Camp Anderson Boy Scouts 75 95 -
Heidelberg Cc 60 16 -
Smith Corner Mennonite Ch 60 51 -
McKee Tavern 50 80 -
Bel Air Park Apts 44 246 -
Leightys Mkt 40 27 -
Ridge View Personal Care Home 35 186 -
Apple Blossom Lane MHP 31 186 -
Getgo #3701 25 37 -
Williamsburg C&ma Church 25 4 -
Relax Inn 25 34 -
Sandys Cs LLC 25 70 -
Scotch Valley Cc 25 45 -
Sheetz Store 169 McKee 25 26 -
Sinking Valley Cc 25 49 -
Milky Way Drive IN 25 23 -
Best Way Pizza 25 136 -
Taco Bell 33404 25 89 -
Conys Kitchen 25 14 -
Wrights Orchard Sta Cpgrd 25 17 -
Greenwood Steak House 25 31 -

Compare beyond Pennsylvania

Mid-flagged peers for Blair County

Cross-state counties nearest Blair County on flagged-system share (98.1%) and cumulative violation count (8,263). 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.