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Community Water System · PWS TX2320004

Knippa WSC

Knippa, Texas 78870-0237 - drinking water served from groundwater sources to 933 people, tracked in EPA SDWIS and UCMR5.

933
People served
17
EPA violations
4
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 17 drinking-water violations at Knippa WSC, 24% of them health-based - below the Texas per-system average.

17
Total EPA violations on record
24%
Health-based (MCL / treatment failure)
933
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Knippa WSC

Knippa WSC is a local-owned community water system that delivers drinking water to 933 residents in Knippa, Texas (Uvalde County) through 311 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 17 total violations for this system , of which 4 (24%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 8 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 8 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

Knippa WSC's 17 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.

Population Served
933
Total Violations
17
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
311
County
Uvalde
School/Daycare
No
MCL Violations
0
Monitoring Violations
8
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 8 2020
LEAD AND COPPER RULE REVISIONS RPT 4 2024
LEAD AND COPPER RULE REVISIONS TT 4 2024

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 58 samples detected PFAS.

Contaminant Date Result MRL Status
PFBS 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFUnA 4/23/2024 <2.00 ppt 2.00 ppt Not Detected
PFHxA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 4/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 4/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFNA 4/23/2024 <4.00 ppt 4.00 ppt Not Detected
NEtFOSAA 4/23/2024 <5.00 ppt 5.00 ppt Not Detected
PFHpA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 4/23/2024 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 4/23/2024 <6.00 ppt 6.00 ppt Not Detected
ADONA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 4/23/2024 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 4/23/2024 <2.00 ppt 2.00 ppt Not Detected
PFPeS 4/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFEESA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpS 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFTA 4/23/2024 <8.00 ppt 8.00 ppt Not Detected
PFMPA 4/23/2024 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 4/23/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 4/23/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 4/23/2024 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 4/23/2024 <5.00 ppt 5.00 ppt Not Detected
NFDHA 4/23/2024 <20.00 ppt 20.00 ppt Not Detected
PFBS 11/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 11/18/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 11/18/2024 <4.00 ppt 4.00 ppt Not Detected
PFNA 11/18/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxS 11/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 11/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 11/18/2024 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 11/18/2024 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 11/18/2024 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 11/18/2024 <7.00 ppt 7.00 ppt Not Detected
PFTA 11/18/2024 <8.00 ppt 8.00 ppt Not Detected
PFPeS 11/18/2024 <4.00 ppt 4.00 ppt Not Detected
PFMBA 11/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 11/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 11/18/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 11/18/2024 <20.00 ppt 20.00 ppt Not Detected
PFPeA 11/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFMPA 11/18/2024 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 11/18/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 11/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxA 11/18/2024 <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 Knippa WSC.

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 TX2320004 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 Knippa WSC 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
2024 LEAD AND COPPER RULE REVISIONS RPT 4 SDWIS / TX2320004 / 5200
2024 LEAD AND COPPER RULE REVISIONS TT 4 SDWIS / TX2320004 / 5200
2020 Lead and Copper Rule MR 8 SDWIS / TX2320004 / 5000

How Knippa WSC Compares

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

Metric Knippa WSC Texas avg Federal benchmark
Total violations 17 101.5 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 22.2 Indicates a contaminant exceeded a federal MCL
PFAS detection None 93.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 933 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 Knippa WSC water safe to drink?
Knippa WSC (PWS ID: TX2320004) has 17 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 933 people using Groundwater sources.
How many people does Knippa WSC serve?
Knippa WSC serves 933 people in Knippa, Texas. It is a Local-owned system using Groundwater water sources with 311 service connections.
What type of violations does Knippa WSC have?
Knippa WSC has 17 total violations: 4 health-based violations (MCL exceedances or treatment failures), 8 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Knippa WSC water?
No. Knippa WSC was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Knippa WSC use?
Knippa WSC uses Groundwater 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.
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.