How many water violations are in Ellis County?

Ellis County has 2,967 total drinking water violations across 34 water systems, of which 972 are health-based violations. 100.0% of systems have at least one violation.

How many people get water from Ellis County systems?

Water systems in Ellis County serve approximately 251,348 people through 34 public water systems.

Has PFAS been detected in Ellis County water?

Under EPA UCMR5, 8 of 10 tested systems in Ellis County had at least one PFAS detection (80.0% of the UCMR5-tested subset - not of all 34 SDWIS systems).

What types of water sources supply Ellis County?

Water systems in Ellis County use SW (17 systems), GW (17 systems) as their primary water sources.

Are health-based violations serious?

Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 32.8% of Ellis County's violations are health-based. Among counties with any SDWIS violations, this extract puts Ellis County in the higher health-based share band. Not all violations indicate immediate health risk, but they require corrective action.

Where does Ellis County sit among U.S. counties for water-system population?

According to EPA SDWIS county population served used on /counties, Ellis County ranks #276 of 3,254 counties by people served, and #25 of 254 counties in Texas. Ordinals use the same total_population DESC sort as the counties directory. See /methodology#corpus-placement.

Counties → Texas

County profile · EPA SDWIS + UCMR5

Ellis County, Texas

34 SDWIS-listed public water systems serve 251,348 people in Ellis County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.

Compiled by PlainWater · May 15, 2026

34
SDWIS water systems Middle third of counties: 2,967
Total violations Upper third of counties: 100.0%
SDWIS systems w/ a violation Middle third of counties: 80.0%
UCMR5 PFAS rate (10 tested) Upper third of counties with tests

SDWIS compliance plate

Sheet TX139 · Ellis County 34 sys · 2,967 viol · #276/3254

VIOL-SEVERE · HEALTH-MID · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-SW · SYS-SMALL · BOOK-FULL

VIOL-SEVERE 100.0% flagged
HEALTH-MID 32.8% health
RANK-TOP #276/3254
PHOTO-FINISH ±0.0 pp
PFAS-HIGH 80.0% detect
SRC-SW SW lead 50%
SYS-SMALL 34 systems
BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Collin County (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Ellis County ranks #276 of 3,254 counties by people served, and #25 of 254 counties in Texas. See methodology · corpus placement.

Ellis County standing, mid-flagged corpus third

Flagged-system rate 100.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 32.8% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 80.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #276 of 3,254 · #25 of 254 in Texas.

Water Systems

System Name	Population	Violations	PFAS
City of Waxahachie	50,814	41	Detected
Rockett Sud	46,614	43	Detected
City of Midlothian	27,699	35	Detected
City of Ennis	24,891	1	Detected
Mountain Peak Sud	23,988	90	Detected
Sardis Lone Elm WSC	20,736	17	Detected
City of Red Oak	18,577	75	Detected
Buena Vista Bethel Sud	8,218	12	Clean
City of Ovilla	4,532	87	Detected
City of Ferris	3,070	95	-
City of Palmer	3,015	114	-
Nash Forreston WSC	2,277	47	-
City of Italy	2,264	58	-
Ellis County Fwsd 1	1,812	4	-
South Ellis County Water Supply	1,767	57	-
East Garrett WSC	1,521	42	-
Avalon WSC	1,218	56	-
Lakeview Camp and Conference Center	1,100	8	-
City of Maypearl	994	73	-
Garrett Community Water Company	864	10	-
City of Milford	796	110	-
Rural Bardwell WSC	756	434	-
City of Bardwell	747	332	-
Buffalo Hills Water System	531	11	-
Grande Casa	501	131	-
Ash Grove Cement	360	12	-
Spanish Grant Subdivision	333	94	Clean
Lakeview Ranchettes	318	77	-
Red Oak Community Water Service	280	129	-
Lakeview Water System	216	22	-
Chambers Meadow Estate Water	198	4	-
Emerald Forest	158	79	-
Howard Water Coop	117	497	-
Coming of Christ Full Gospel Church	66	70	-

Compare beyond Texas

Mid-flagged peers for Ellis County

Cross-state counties nearest Ellis County on flagged-system share (100.0%) and cumulative violation count (2,967). 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

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.