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Counties → Pennsylvania

Butler County, Pennsylvania

SDWIS compliance plate

Sheet PA019 · Butler County 182 sys · 24,329 viol · #403/3254

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

  • VIOL-SEVERE 91.8% flagged
  • HEALTH-LOW 5.2% health
  • RANK-TOP #403/3254
  • PHOTO-FINISH ±0.8 pp
  • PFAS-MID 25.0% detect
  • SRC-GW GW lead 96%
  • SYS-LARGE 182 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Washington County ( -0.8 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Butler County ranks #403 of 3,254 counties by people served, and #21 of 68 counties in Pennsylvania. See methodology · corpus placement.

Butler County standing, lower-flagged corpus third

Flagged-system rate 91.8% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 5.2% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 25.0% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #403 of 3,254 · #21 of 68 in Pennsylvania.

Flagged-rate neighbourhood around Butler County

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

0% 20% 40% 60% 80% 100% Greene · lowest Washington · near Jefferson · near Sullivan · highest 66.7% 90.6% 90.9% 91.8% 92.9% 93.5% 100%

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

Water Systems

System Name Population Violations PFAS
PA American Water Co Butler 43,286 9 Clean
Cranberry Twp WTP 42,000 58 Clean
Slippery Rock Muni Auth 15,778 173 Clean
Municipal Water Auth Adams Twp 8,700 115 Clean
Harmony Boro Water Auth 6,669 422 Detected
Zelienople Boro 4,123 307 Detected
Petroleum Valley Rwa 3,800 25 -
Seven Fields Boro Water Dept 3,100 90 -
Slippery Rock Campground Assn 2,360 36 -
Iron Mountain 2,000 208 -
Moraine Camplands 2,000 32 -
Evans City Borough 1,990 702 -
Mars Borough Water Works 1,956 519 -
Moraine State Park Water Syst 1,200 846 -
Chicora Boro Water Supply 1,100 179 -
Pilot Travel Center 1,100 174 -
Concordia Lutheran Home 950 151 -
Coopers Lake Campground 750 106 -
Dassa McKinney Elem School 650 152 -
St Wendelin Church & School 620 114 -
Moniteau JR/SR High School 600 298 -
A C Valley Development Corp 500 785 -
Lake Arthur Estates 460 172 -
Loves Travel Stop 731 430 0 -
Moraine Elementary School 424 392 -
Cranberry Village MHP 400 50 -
Brady Hills Ml 400 271 -
Penn United Tech 340 662 -
Sandy Hill Estates 325 364 -
Acords Dairy Queen 300 48 -
Smithgrove Campground 300 35 -
Camp Lutherlyn Main Shaulis 300 33 -
R C Mens Club 300 23 -
Camp Bucoco Moraine Trails 250 12 -
Autumn Grove Care Center 240 101 -
Crestfield Camp & Conf Ctr 240 75 -
Marion Twp WTP 225 345 -
Portersville Christian 221 34 -
Coral Ridge Estates MHP 200 414 -
Suncrest Golf Course 200 9 -
Starlight Drivein 200 44 -
St Lukes School 200 219 -
Fair Winds 182 567 -
Rolling Valley Estates 180 254 -
Bernies Mobile Home Park 170 362 -
Adams Mfg Plant 2 160 388 -
Chicora Medical Center 150 126 -
Stoneworth Apts WTP 150 835 -
Calvary Orth Presby Church 150 30 -
Camp Redwing 150 38 -

Compare beyond Pennsylvania

Lower-flagged peers for Butler County

Cross-state counties nearest Butler County on flagged-system share (91.8%) and cumulative violation count (24,329). 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.