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Community Water System · PWS TX0910006

City of Sherman

Sherman, Texas 75091-1106 - drinking water served from surface water sources to 43,645 people, tracked in EPA SDWIS and UCMR5.

43,645
People served
49
EPA violations
3
Health-based
3 PFAS
UCMR5 result

The verdict

EPA records 49 drinking-water violations at City of Sherman, 6% of them health-based - below the Texas per-system average, and UCMR5 testing detected 3 PFAS compounds.

49
Total EPA violations on record
6%
Health-based (MCL / treatment failure)
43,645
People served by this system
3
PFAS compounds detected (UCMR5)

Water Quality Snapshot: City of Sherman

City of Sherman is a local-owned community water system that delivers drinking water to 43,645 residents in Sherman, Texas (Grayson County) through 23,706 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 49 total violations for this system , of which 3 (6%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 44 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 16 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 3 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 8.3 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Texas, EPA tracks 7,351 public water systems serving 33,253,313 people, with 746,210 cumulative violations and 162,945 health-based violations on record. About 90% of systems in the state carry at least one violation, and state-wide the average per system is 101.5 violations. Statewide, 1,068 of 1,147 UCMR5-tested systems have reported PFAS detections (93.1%).

City of Sherman's 49 violations sit below the Texas average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

3 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
43,645
Total Violations
49
Health-Based Violations
3
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
23,706
County
Grayson
School/Daycare
No
MCL Violations
0
Monitoring Violations
44
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 16 2021
Interim Enhanced Surface Water Treatment Rule MR 12 2021
Surface Water Treatment Rule TT 3 1993
Coliform (TCR) MR 2 2008
OXAMYL MR 1 2021
Aldicarb sulfoxide MR 1 2021
2,4-D MR 1 2021
Fluoride MR 1 2021
2,4,5-TP MR 1 2021
Dinoseb MR 1 2021
Dalapon MR 1 2021
Aldicarb MR 1 2021
Carbofuran MR 1 2021
CYANIDE MR 1 2021
ETHYLENE DIBROMIDE MR 1 2021
Aldicarb sulfone MR 1 2021
1,2-DIBROMO-3-CHLOROPROPANE MR 1 2021
Picloram MR 1 2021

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 7 of 638 samples detected PFAS.

Contaminant Date Result MRL Status
PFEESA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFTA 8/14/2023 <8.00 ppt 8.00 ppt Not Detected
PFPeA 8/14/2023 3.80 ppt 3.00 ppt Detected
PFPeS 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFMBA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 8/14/2023 <20.00 ppt 20.00 ppt Not Detected
NMeFOSAA 8/14/2023 <6.00 ppt 6.00 ppt Not Detected
PFTrDA 8/14/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpS 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFBS 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 8/14/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxS 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFOS 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 8/14/2023 3.60 ppt 3.00 ppt Detected
11Cl-PF3OUdS 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 8/14/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 8/14/2023 <20.00 ppt 20.00 ppt Not Detected
PFUnA 8/14/2023 <2.00 ppt 2.00 ppt Not Detected
PFPeS 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFEESA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFNA 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 8/14/2023 <3.00 ppt 3.00 ppt Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for City of Sherman.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID TX0910006 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Texas Drinking Water Authority

Texas Commission on Environmental Quality (TCEQ) - Drinking Water Watch is the primacy agency that licenses and inspects City of Sherman under EPA-delegated authority.

Open TX regulator portal

Source: Texas Commission on Environmental Quality (TCEQ) - Drinking Water Watch

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2021 Surface Water Treatment Rule MR 16 SDWIS / TX0910006 / 0200
2021 Interim Enhanced Surface Water Treatment Rule MR 12 SDWIS / TX0910006 / 0300
2021 OXAMYL MR 1 SDWIS / TX0910006 / 2036
2021 Aldicarb sulfoxide MR 1 SDWIS / TX0910006 / 2043
2021 2,4-D MR 1 SDWIS / TX0910006 / 2105
2021 Fluoride MR 1 SDWIS / TX0910006 / 1025
2021 2,4,5-TP MR 1 SDWIS / TX0910006 / 2110
2021 Dinoseb MR 1 SDWIS / TX0910006 / 2041
2021 Dalapon MR 1 SDWIS / TX0910006 / 2031
2021 Aldicarb MR 1 SDWIS / TX0910006 / 2047
2021 Carbofuran MR 1 SDWIS / TX0910006 / 2046
2021 CYANIDE MR 1 SDWIS / TX0910006 / 1024
2021 ETHYLENE DIBROMIDE MR 1 SDWIS / TX0910006 / 2946
2021 Aldicarb sulfone MR 1 SDWIS / TX0910006 / 2044
2021 1,2-DIBROMO-3-CHLOROPROPANE MR 1 SDWIS / TX0910006 / 2931

How City of Sherman Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric City of Sherman Texas avg Federal benchmark
Total violations 49 101.5 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 3 22.2 Indicates a contaminant exceeded a federal MCL
PFAS detection 3 compounds 93.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 43,645 4,524 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 7,351 regulated public water systems in Texas.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is City of Sherman water safe to drink? ▼
City of Sherman (PWS ID: TX0910006) has 49 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 3 PFAS compounds found. This system serves 43,645 people using Surface Water sources.
How many people does City of Sherman serve? ▼
City of Sherman serves 43,645 people in Sherman, Texas. It is a Local-owned system using Surface Water water sources with 23,706 service connections.
What type of violations does City of Sherman have? ▼
City of Sherman has 49 total violations: 3 health-based violations (MCL exceedances or treatment failures), 44 monitoring/reporting violations, and 3 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in City of Sherman water? ▼
Yes. UCMR5 testing detected 3 PFAS compounds in City of Sherman's water supply: PFPeA, PFHxA, PFBA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does City of Sherman use? ▼
City of Sherman uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology - 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 Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from 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.