Mercer County, Illinois
SDWIS compliance plate
Sheet IL131 · Mercer County 27 sys · 2,138 viol · #2269/3254
VIOL-SEVERE · HEALTH-MID · RANK-LOWER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 81.5% flagged
- HEALTH-MID 27.3% health
- RANK-LOWER #2269/3254
- PHOTO-FINISH ±0.2 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 100%
- SYS-SMALL 27 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Jo Daviess County (+ 0.2 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Mercer County ranks #2,269 of 3,254 counties by people served, and #81 of 102 counties in Illinois. See methodology · corpus placement.
Mercer County standing, lower-flagged corpus third
Flagged-system rate 81.5% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 27.3% is health-based share above the upper 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 #2,269 of 3,254 · #81 of 102 in Illinois.
Flagged-rate neighbourhood around Mercer County
Lowest/highest poles plus in-state counties nearest Mercer County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Aledo | 3,470 | 54 | Clean |
| Viola | 970 | 861 | - |
| Sherrard | 785 | 76 | - |
| Fyre Lake Water Company | 760 | 18 | - |
| Keithsburg | 747 | 24 | - |
| New Windsor | 740 | 112 | - |
| Matherville | 651 | 165 | - |
| New Boston | 613 | 142 | - |
| 7 Eleven | 504 | 0 | - |
| Joy | 377 | 67 | - |
| Seaton | 214 | 142 | - |
| North Henderson | 172 | 140 | - |
| Trinity Presbyterian Church | 150 | 0 | - |
| Swedona Water Association | 109 | 76 | - |
| Camp Summit | 100 | 31 | - |
| First Christian Church (131912) | 100 | 5 | - |
| M C L W System, Inc. | 98 | 78 | - |
| Unity Water Corporation | 93 | 90 | - |
| Norwood United Presbyterian Church | 80 | 0 | - |
| Haven Hills Campground and Resort | 80 | 0 | - |
| Cable Community Church | 70 | 7 | - |
| Mercer Market Vending Machine | 60 | 6 | - |
| Boden Comm Water Assn | 50 | 2 | - |
| Gold Star Fs | 40 | 4 | - |
| Lgc Shady Lakes RV LLC | 25 | 32 | - |
| Midwest Fiber Products Inc | 25 | 6 | - |
| Twice the Ice Aledo | 25 | 0 | - |
Compare beyond Illinois
Lower-flagged peers for Mercer County
Cross-state counties nearest Mercer County on flagged-system share (81.5%) and cumulative violation count (2,138). 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.
Similar violation load
Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).
Read our methodology · Check your water system - how this data is sourced, computed, and verified.
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.