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Tap water quality report

Winterthur

EPA monitoring tested this supplier for 75 contaminants and detected 14. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

75
contaminants tested
14
detected
687
people served
0
health-based violations
Delaware rankingsLead in DelawarePFAS in Delaware
Water source
Ground water
Ownership
Private
Counties served
New Castle

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

0
health-based violations
5
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2006-10-01
MR Monitoring Resolved 2006-10-01
MR Monitoring Resolved 2006-10-01
MR Monitoring Archived 1998-10-01 → 1998-10-31
MR Monitoring Archived 1998-10-01 → 1998-10-31

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
1077.7 µg/L 11%
of the EPA limit 10000 µg/L
 18/18 SYR4 2012–2019
Copper
102.925 µg/L 7.9%
of the EPA limit 1300 µg/L
worst single sample: 124 µg/L
16/16 SYR4 2012–2018
Lead
0.0120 mg/L 80%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2024
Nitrate-Nitrite
1046.62 µg/L 10%
of the EPA limit 10000 µg/L
worst single sample: 1077.7 µg/L
9/9 SYR4 2012–2019
Dibromochloromethane
1.603 µg/L
No EPA limit set
worst single sample: 1.75 µg/L
7/7 SYR4 2013–2019
Bromodichloromethane
2.0025 µg/L
No EPA limit set
worst single sample: 2.1 µg/L
6/7 SYR4 2013–2019
Chloroform
2.3 µg/L
No EPA limit set
worst single sample: 2.36 µg/L
6/7 SYR4 2013–2019
TTHM
5.906 µg/L 7.4%
of the EPA limit 80 µg/L
worst single sample: 5.97 µg/L
3/3 SYR4 2013–2017
Lead
1.4 µg/L 9.3%
of the EPA limit 15 µg/L
 2/16 SYR4 2012–2018
Barium
18.6 µg/L 0.9%
of the EPA limit 2000 µg/L
 1/1 SYR4 2016
Combined Radium (-226 And -228)
0.3080 pCi/L 6.2%
of the EPA limit 5 pCi/L
 1/1 SYR4 2016
Di(2-ethylhexyl) Phthalate
0.8000 µg/L 13%
of the EPA limit 6 µg/L
 1/7 SYR4 2012–2019
Dichloroacetic Acid
1.24 µg/L
No EPA limit set
 1/3 SYR4 2013–2017
Total Haloacetic Acids (HAA5)
1.24 µg/L 2.1%
of the EPA limit 60 µg/L
 1/3 SYR4 2013–2017
61 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDibromoacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneFluorideHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CASTLE, JOHN
Phone
302-888-4954
Email
[email protected]

Frequently asked questions about Winterthur

Is Winterthur tap water safe to drink?

EPA monitoring detected 14 contaminants in Winterthur's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Winterthur's water?

EPA monitoring detected Nitrate, Copper, Lead, Nitrate-Nitrite, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Winterthur serve?

Winterthur reports serving 687 people in Delaware, per its EPA record.

Has Winterthur had any water quality violations?

The EPA has 5 violations on file for Winterthur, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.