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Tap water quality report

Winston-Salem, City of

EPA monitoring tested this supplier for 107 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

107
contaminants tested
19
detected
391,900
people served
0
health-based violations
North Carolina rankingsLead in North CarolinaPFAS in North Carolina
Water source
Surface water
Ownership
Local government
Counties served
Forsyth

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
120
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2021-07-01 → 2021-07-31
MR Monitoring Resolved 2021-07-01 → 2021-07-31
MR Monitoring Resolved 2021-07-01 → 2021-07-31
MR Monitoring Resolved 2021-07-01 → 2021-07-31
MR Monitoring Resolved 2021-07-01 → 2021-07-31
MR Monitoring Resolved 2019-12-01 → 2019-12-31
MR Monitoring Resolved 2019-12-01 → 2019-12-31
MR Monitoring Resolved 2019-12-01 → 2019-12-31
MR Monitoring Resolved 2019-12-01 → 2019-12-31
MR Monitoring Resolved 2019-12-01 → 2019-12-31

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
Total Haloacetic Acids (HAA5)
42.985 µg/L 72%
of the EPA limit 60 µg/L
worst single sample: 49.6 µg/L
384/384 SYR4 2012–2019
TTHM
83 µg/L 104%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 120.1 µg/L
381/381 SYR4 2012–2019
Bromodichloromethane
13 µg/L
No EPA limit set
worst single sample: 19 µg/L
372/372 SYR4 2012–2019
Chloroform
69.58 µg/L
No EPA limit set
worst single sample: 104.4 µg/L
372/372 SYR4 2012–2019
Dichloroacetic Acid
24.945 µg/L
No EPA limit set
worst single sample: 249 µg/L
372/372 SYR4 2012–2019
Trichloroacetic Acid
17.335 µg/L
No EPA limit set
worst single sample: 20.6 µg/L
372/372 SYR4 2012–2019
Dibromochloromethane
2.94 µg/L
No EPA limit set
worst single sample: 4 µg/L
185/372 SYR4 2012–2019
Fluoride
813.4 µg/L 20%
of the EPA limit 4000 µg/L
worst single sample: 1250 µg/L
164/222 SYR4 2012–2019
Monochloroacetic Acid
5.8 µg/L
No EPA limit set
worst single sample: 21 µg/L
41/372 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2025
Copper
120.55 µg/L 9.3%
of the EPA limit 1300 µg/L
worst single sample: 129 µg/L
14/164 SYR4 2013–2019
Nitrate
1000 µg/L 10%
of the EPA limit 10000 µg/L
 8/306 SYR4 2012–2019
Lead
15 µg/L 100%
of the EPA limit 15 µg/L
worst single sample: 16 µg/L
5/164 SYR4 2013–2019
Nitrate-Nitrite
929.5 µg/L 9.3%
of the EPA limit 10000 µg/L
worst single sample: 1000 µg/L
4/147 SYR4 2012–2019
Atrazine
0.1200 µg/L 4%
of the EPA limit 3 µg/L
 1/39 SYR4 2012–2019
Bromoform
1 µg/L
No EPA limit set
 1/372 SYR4 2012–2019
Dibromoacetic Acid
1 µg/L
No EPA limit set
 1/372 SYR4 2012–2019
Toluene
0.5000 µg/L 0.1%
of the EPA limit 1000 µg/L
 1/26 SYR4 2012–2019
Xylenes, Total
0.5000 µg/L 0%
of the EPA limit 10000 µg/L
 1/26 SYR4 2012–2019
88 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
FOWLER, ALAN S
Phone
336-397-7727
Email
[email protected]

Frequently asked questions about Winston-Salem, City of

Is Winston-Salem, City of tap water safe to drink?

EPA monitoring detected 19 contaminants in Winston-Salem, City of'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 Winston-Salem, City of's water?

EPA monitoring detected Total Haloacetic Acids (HAA5), TTHM, Bromodichloromethane, Chloroform, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Winston-Salem, City of serve?

Winston-Salem, City of reports serving 391,900 people in North Carolina, per its EPA record.

Has Winston-Salem, City of had any water quality violations?

The EPA has 120 violations on file for Winston-Salem, City of, 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.