Is Knightdale, NC Tap Water Safe? Quality & Contaminants

What was found in Knightdale's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	1100 µg/L 11% of the EPA limit 10000 µg/L Main supplier: ROCKBRIDGE S/D · 1,042 people · 2019 Highest in the city: 8900 µg/L — THORNBURG S/D · 160 people · 2019	32/34	SYR4
Nitrate-Nitrite	1100 µg/L 11% of the EPA limit 10000 µg/L Main supplier: ROCKBRIDGE S/D · 1,042 people · 2018 Highest in the city: 8860 µg/L — THORNBURG S/D · 160 people · 2019	31/34	SYR4
Barium	6988 µg/L 349% of the EPA limit, at the 95th percentile of samples — 2000 µg/L Highest in the city: MOOREFIELD S/D · 181 people · 2019	9/34	SYR4
Copper	96.4 µg/L 7.4% of the EPA limit 1300 µg/L Main supplier: ROCKBRIDGE S/D · 1,042 people · 2017 Highest in the city: 1844.5 µg/L — AMBER ACRES · 239 people · 2019	33/34	SYR4
Fluoride	364 µg/L 9.1% of the EPA limit 4000 µg/L Main supplier: ROCKBRIDGE S/D · 1,042 people · 2017 Highest in the city: 1570 µg/L — CREEKSIDE MOBILE VILLAGE · 165 people · 2019	32/34	SYR4
Combined Uranium	245.5 µg/L 818% of the EPA limit, at the 95th percentile of samples — 30 µg/L Main supplier: ROCKBRIDGE S/D · 1,042 people · 2019	28/34	SYR4
Gross Alpha, Excl. Radon And U	87.04 pCi/L 580% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Main supplier: ROCKBRIDGE S/D · 1,042 people · 2019	3/34	SYR4
Xylenes, Total	68.97 µg/L 0.7% of the EPA limit 10000 µg/L Highest in the city: SHADY ACRES MH VILLAGE · 115 people · 2019	10/34	SYR4
Tetrachloroethylene	44.6 µg/L 892% of the EPA limit, at the 95th percentile of samples — 5 µg/L Highest in the city: SUMMERFIELD MHP · 110 people · 2019	3/34	SYR4
Lead	4.9 µg/L 33% of the EPA limit 15 µg/L Main supplier: ROCKBRIDGE S/D · 1,042 people · 2017 Highest in the city: 36.85 µg/L — AMBER ACRES · 239 people · 2019	19/34	SYR4
Gross Beta Particle Activity	34.56 pCi/L No EPA limit set Highest in the city: AUBURN HILLS S/D · 94 people · 2019	16/34	SYR4
TTHM	1 µg/L 1.3% of the EPA limit 80 µg/L Main supplier: ROCKBRIDGE S/D · 1,042 people · 2019 Highest in the city: 18.38 µg/L — OLD MILBURNIE CROSSING S/D · 262 people · 2017	20/34	SYR4
Total Haloacetic Acids (HAA5)	4.2 µg/L 7% of the EPA limit 60 µg/L Main supplier: ROCKBRIDGE S/D · 1,042 people · 2019 Highest in the city: 17 µg/L — EL CAMINO ACRES S/D · 49 people · 2019	10/34	SYR4
Combined Radium (-226 And -228)	2.38 pCi/L 48% of the EPA limit 5 pCi/L Main supplier: ROCKBRIDGE S/D · 1,042 people · 2019 Highest in the city: 15.59 pCi/L — ASHLEY HILLS NORTH S/D · 602 people · 2019	26/34	SYR4
Ethylbenzene	15.36 µg/L 2.2% of the EPA limit 700 µg/L Highest in the city: SHADY ACRES MH VILLAGE · 115 people · 2019	5/34	SYR4
Dichloroacetic Acid	4.2 µg/L No EPA limit set Main supplier: ROCKBRIDGE S/D · 1,042 people · 2019 Highest in the city: 8.9 µg/L — EL CAMINO ACRES S/D · 49 people · 2019	6/34	SYR4
Toluene	6.4 µg/L 0.6% of the EPA limit 1000 µg/L Highest in the city: ASHLEY HILLS S/D · 453 people · 2019	3/34	SYR4
Dibromoacetic Acid	6.3 µg/L No EPA limit set Highest in the city: EL CAMINO ACRES S/D · 49 people · 2019	7/34	SYR4
Chloroform	1 µg/L No EPA limit set Main supplier: ROCKBRIDGE S/D · 1,042 people · 2019 Highest in the city: 5.9 µg/L — PINE COUNTRY ESTATES · 44 people · 2019	12/34	SYR4
Dichloromethane	5.5 µg/L 110% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: ROCKBRIDGE S/D · 1,042 people · 2018	2/34	SYR4
Antimony, Total	4.44 µg/L 74% of the EPA limit 6 µg/L Highest in the city: BARCLAY DOWNS S/D · 459 people · 2019	2/34	SYR4
Bromodichloromethane	3.59 µg/L No EPA limit set Highest in the city: SANDY TRAIL S/D · 739 people · 2019	11/34	SYR4
Di(2-ethylhexyl) Phthalate	3.1 µg/L 52% of the EPA limit 6 µg/L Highest in the city: BARCLAY DOWNS S/D · 459 people · 2018	2/34	SYR4
Bromoform	2.955 µg/L No EPA limit set Highest in the city: CREEKSIDE MOBILE VILLAGE · 165 people · 2017	7/34	SYR4
Dibromochloromethane	2.86 µg/L No EPA limit set Highest in the city: RUTLEDGE LANDING S/D · 713 people · 2019	12/34	SYR4
1,2-Dichloropropane	2.58 µg/L 52% of the EPA limit 5 µg/L Highest in the city: SHADY ACRES MH VILLAGE · 115 people · 2019	2/34	SYR4
Trichloroacetic Acid	2.1 µg/L No EPA limit set Highest in the city: EL CAMINO ACRES S/D · 49 people · 2019	1/34	SYR4
Selenium	1.5 µg/L 3% of the EPA limit 50 µg/L Highest in the city: BAYWOOD FOREST S/D · 533 people · 2018	2/34	SYR4
Chlordane	1.35 µg/L 68% of the EPA limit 2 µg/L Highest in the city: AMBER ACRES · 239 people · 2019	2/34	SYR4
Thallium, Total	1.16 µg/L 58% of the EPA limit 2 µg/L Highest in the city: PINE COUNTRY ESTATES · 44 people · 2017	2/34	SYR4
Ethylene Dibromide	0.5700 µg/L 1140% of the EPA limit, at the 95th percentile of samples — 0.0500 µg/L Highest in the city: SHADY ACRES MH VILLAGE · 115 people · 2019	1/34	SYR4
Mercury	0.3500 µg/L 18% of the EPA limit 2 µg/L Highest in the city: SUMMERFIELD MHP · 110 people · 2019	1/34	SYR4
Heptachlor Epoxide	0.0534 µg/L 27% of the EPA limit 0.2000 µg/L Highest in the city: AMBER ACRES · 239 people · 2019	4/34	SYR4
Lead	0.0030 mg/L 20% of the EPA limit 0.0150 mg/L Main supplier: ROCKBRIDGE S/D · 1,042 people · 2025 Highest in the city: 0.0100 mg/L — OAK GROVE OF KNIGHTDALE · 122 people · 2025	34/34	LCR

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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Knightdale

Supplier	Population served
ROCKBRIDGE S/D	1,042
AMBER ACRES NORTH S/D	752
AMBER RIDGE S/D	742
SANDY TRAIL S/D	739
RUTLEDGE LANDING S/D	713
ASHLEY HILLS NORTH S/D	602
BAYWOOD FOREST S/D	533
BARCLAY DOWNS S/D	459
RIDGEHAVEN S/D	455
ASHLEY HILLS S/D	453
KINGS GRANT S/D	412
RUTLEDGE LANDING NORTH	389
ACRES OF SPACE MHP	332
OLD MILBURNIE CROSSING S/D	262
AMBER ACRES	239
VILLAGE SQUIRE MOBILE ESTATES	232
VALLEY WOODS MHP	224
COTTONWOOD S/D	203
MOOREFIELD S/D	181
CREEKSIDE MOBILE VILLAGE	165
THORNBURG S/D	160
HIDDEN HOLLOW S/D	123
OAK GROVE OF KNIGHTDALE	122
SHADY ACRES MH VILLAGE	115
SUMMERFIELD MHP	110
AUBURN HILLS S/D	94
PRESERVE AT LONG BRANCH	90
MEAD-O-VIEW MHP	90
COUNTRY SQUIRE ESTATES	85
MEADOW GLEN S/D	84
OAKES PLANTATION S/D	60
EL CAMINO ACRES S/D	49
PINE COUNTRY ESTATES	44
CAMELOT MHP	34

Frequently asked questions about Knightdale tap water

Is Knightdale tap water safe to drink?

EPA testing detected 34 contaminants in the water serving Knightdale. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Knightdale?

34 public water suppliers report drinking-water monitoring for Knightdale, North Carolina to the EPA. Each is listed above with its population served.

What contaminants are in Knightdale's water?

The contaminants EPA monitoring detected in Knightdale include Nitrate, Nitrate-Nitrite, Barium, Copper, Fluoride. The full list, with the level at the main supplier and the data source, is in the table above.

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.