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Counties → Iowa

Jones County, Iowa

SDWIS compliance plate

Sheet IA105 · Jones County 36 sys · 4,745 viol · #1960/3254

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

  • VIOL-SEVERE 97.2% flagged
  • HEALTH-LOW 17.6% health
  • RANK-LOWER #1960/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 100%
  • SYS-SMALL 36 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Cerro Gordo County ( -0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Jones County ranks #1,960 of 3,254 counties by people served, and #34 of 99 counties in Iowa. See methodology · corpus placement.

Jones County standing, mid-flagged corpus third

Flagged-system rate 97.2% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 17.6% 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 #1,960 of 3,254 · #34 of 99 in Iowa.

Flagged-rate neighbourhood around Jones County

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

0% 20% 40% 60% 80% 100% Mahaska · lowest Kossuth · near Cerro Gordo · near Ringgold · highest 75% 96% 96.3% 96.4% 97.1% 97.2% 100%

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

Water Systems

System Name Population Violations PFAS
Anamosa Municipal Water Supply 4,457 137 Clean
Monticello Water Supply 4,040 62 Clean
Anamosa State Penitentiary 1,230 42 -
Caseys General Store (Anamosa) 1,215 202 -
Olin Water Supply 651 55 -
Wyoming Water System 523 34 -
Shops Above the Wapsi 515 57 -
Oxford Junction Water Supply 424 145 -
Central Park - Jones Conservation 260 134 -
Martelle Water Works 249 9 -
Onslow Water Supply 201 123 -
Apostolic Church 200 49 -
Camp Bear Creek 191 113 -
St Johns Lutheran Church 157 190 -
Camp Courageous of Iowa 155 143 -
Monticello Jellystone Park 153 97 -
Wapsipinicon State Pk-Campground/Lodge 150 43 -
Scooters 125 82 -
Wildwood Acres Association 100 240 -
Center Junction (Eiruss) 100 113 -
Morley Municipal Water Supply 98 206 -
The Hillside Bar & Grill 92 223 -
Wapsipinicon Country Club 85 203 -
Bacon Addition 81 71 -
Fairview Terrrace Mobile Home Park LLC 72 34 -
Montipark LLC 60 931 -
Camp Courageous 2 56 272 -
Hale Tap 54 56 -
Wayne Zion Lutheran Church 52 152 -
Fawn Creek Country Club 50 42 -
Monticello Jellystone Park II 50 56 -
Saints Peter & Paul Lutheran Church 45 165 -
The Grove 31 188 -
Outback Canoe Rental 27 40 -
Lubben Winery 25 0 -
Savor the Barn LLC 25 36 -

Compare beyond Iowa

Mid-flagged peers for Jones County

Cross-state counties nearest Jones County on flagged-system share (97.2%) and cumulative violation count (4,745). 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.