Jefferson County, Iowa
SDWIS compliance plate
Sheet IA101 · Jefferson County 8 sys · 262 viol · #2237/3254
VIOL-SEVERE · HEALTH-LOW · RANK-LOWER · ABOVE-PEER · PFAS-CLEAN · SRC-GW · SYS-TINY · BOOK-FULL
- VIOL-SEVERE 87.5% flagged
- HEALTH-LOW 17.9% health
- RANK-LOWER #2237/3254
- ABOVE-PEER +1.8 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 75%
- SYS-TINY 8 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Story County ( -1.8 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Jefferson County ranks #2,237 of 3,254 counties by people served, and #55 of 99 counties in Iowa. See methodology · corpus placement.
Jefferson County standing, lower-flagged corpus third
Flagged-system rate 87.5% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 17.9% 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 #2,237 of 3,254 · #55 of 99 in Iowa.
Flagged-rate neighbourhood around Jefferson County
Lowest/highest poles plus in-state counties nearest Jefferson County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Fairfield Water Supply | 9,821 | 53 | Clean |
| Jefferson County Rural Water District | 468 | 40 | - |
| Batavia Water Works | 430 | 56 | - |
| Libertyville Water Works | 274 | 23 | - |
| Lockridge Muni Water Supply | 244 | 31 | - |
| Fairfield Estates Mobile Home Park | 140 | 0 | - |
| Ila Campus LLC | 68 | 32 | - |
| Maharishi Vedic City Water Supply | 60 | 27 | - |
Compare beyond Iowa
Lower-flagged peers for Jefferson County
Cross-state counties nearest Jefferson County on flagged-system share (87.5%) and cumulative violation count (262). 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.