What was found in Apex'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 | 2400 µg/L 24% of the EPA limit 10000 µg/L Highest in the city: OAK RIDGE PARK MHP · 108 people · 2019 | 4/16 | SYR4 |
| Nitrate-Nitrite | 2400 µg/L 24% of the EPA limit 10000 µg/L Highest in the city: OAK RIDGE PARK MHP · 108 people · 2019 | 4/16 | SYR4 |
| Copper | 120 µg/L 9.2% of the EPA limit 1300 µg/L Main supplier: APEX, TOWN OF · 83,001 people · 2019
Highest in the city: 869.2 µg/L — RIDGEBROOK BLUFF S/D · 234 people · 2017 | 15/16 | SYR4 |
| Fluoride | 752 µg/L 19% of the EPA limit 4000 µg/L Highest in the city: CHATHAM CO-NORTH · 23,088 people · 2019 | 9/16 | SYR4 |
| Barium | 490.4 µg/L 25% of the EPA limit 2000 µg/L Highest in the city: COUNTRY ESTATES MHP · 60 people · 2019 | 2/16 | SYR4 |
| TTHM | 65 µg/L 81% of the EPA limit 80 µg/L Main supplier: APEX, TOWN OF · 83,001 people · 2019
Highest in the city: 74 µg/L — FELTONSVILLE COMM ORGANIZATION · 225 people · 2019 | 7/16 | SYR4 |
| Lead | 9.86 µg/L 66% of the EPA limit 15 µg/L Main supplier: APEX, TOWN OF · 83,001 people · 2019
Highest in the city: 65.27 µg/L — CHATHAM CO-NORTH · 23,088 people · 2018 | 7/16 | SYR4 |
| Total Haloacetic Acids (HAA5) | 31.95 µg/L 53% of the EPA limit 60 µg/L Main supplier: APEX, TOWN OF · 83,001 people · 2019
Highest in the city: 33.6 µg/L — FELTONSVILLE COMM ORGANIZATION · 225 people · 2019 | 6/16 | SYR4 |
| Chloroform | 29 µg/L No EPA limit set Main supplier: APEX, TOWN OF · 83,001 people · 2019 | 4/16 | SYR4 |
| Bromodichloromethane | 22 µg/L No EPA limit set Main supplier: APEX, TOWN OF · 83,001 people · 2019
Highest in the city: 23.1 µg/L — FELTONSVILLE COMM ORGANIZATION · 225 people · 2019 | 4/16 | SYR4 |
| Dibromochloromethane | 20.7 µg/L No EPA limit set Main supplier: APEX, TOWN OF · 83,001 people · 2019 | 4/16 | SYR4 |
| Dichloroacetic Acid | 20 µg/L No EPA limit set Main supplier: APEX, TOWN OF · 83,001 people · 2019 | 5/16 | SYR4 |
| Monobromoacetic Acid | 16.5 µg/L No EPA limit set Main supplier: APEX, TOWN OF · 83,001 people · 2019 | 3/16 | SYR4 |
| Monochloroacetic Acid | 14.25 µg/L No EPA limit set Main supplier: APEX, TOWN OF · 83,001 people · 2019 | 2/16 | SYR4 |
| Lithium | 11.3 µg/L No EPA limit set Highest in the city: MEADOW LAKE S/D · 42 people · 2025 | 1/16 | UCMR-5 |
| Bromoform | 11 µg/L No EPA limit set Main supplier: APEX, TOWN OF · 83,001 people · 2019 | 4/16 | SYR4 |
| Dalapon | 11 µg/L 5.5% of the EPA limit 200 µg/L Highest in the city: LANGSTON ESTATES S/D · 174 people · 2019 | 1/16 | SYR4 |
| Trichloroacetic Acid | 10 µg/L No EPA limit set Main supplier: APEX, TOWN OF · 83,001 people · 2019
Highest in the city: 10.95 µg/L — FELTONSVILLE COMM ORGANIZATION · 225 people · 2019 | 5/16 | SYR4 |
| Toluene | 9.5 µg/L 1% of the EPA limit 1000 µg/L Highest in the city: RIDGEBROOK BLUFF S/D · 234 people · 2019 | 1/16 | SYR4 |
| Gross Beta Particle Activity | 7.335 pCi/L No EPA limit set Highest in the city: COUNTRY ESTATES MHP · 60 people · 2018 | 6/16 | SYR4 |
| Dibromoacetic Acid | 6.67 µg/L No EPA limit set Main supplier: APEX, TOWN OF · 83,001 people · 2019 | 5/16 | SYR4 |
| Combined Uranium | 6.28035 µg/L 21% of the EPA limit 30 µg/L Highest in the city: COUNTRY ESTATES MHP · 60 people · 2018 | 1/16 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 2.16 µg/L 36% of the EPA limit 6 µg/L Highest in the city: MEADOW LAKE S/D · 42 people · 2019 | 1/16 | SYR4 |
| Combined Radium (-226 And -228) | 1.975 pCi/L 40% of the EPA limit 5 pCi/L Highest in the city: COUNTRY ESTATES MHP · 60 people · 2018 | 4/16 | SYR4 |
| Tetrachloroethylene | 0.9000 µg/L 18% of the EPA limit 5 µg/L Highest in the city: CHATHAM CO-NORTH · 23,088 people · 2019 | 1/16 | SYR4 |
| 1,2-Dichloropropane | 0.6720 µg/L 13% of the EPA limit 5 µg/L Highest in the city: RIDGEBROOK BLUFF S/D · 234 people · 2019 | 1/16 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: APEX, TOWN OF · 83,001 people · 2025
Highest in the city: 0.0200 mg/L — FELTONSVILLE COMM ORGANIZATION · 225 people · 2009 | 16/16 | LCR |
| Pfba | 0.0089 µg/L No EPA limit set Main supplier: APEX, TOWN OF · 83,001 people · 2024 | 1/16 | UCMR-5 |
| Pfpea | 0.0078 µg/L No EPA limit set Main supplier: APEX, TOWN OF · 83,001 people · 2024 | 2/16 | UCMR-5 |
| Pfhxa | 0.0068 µg/L No EPA limit set Main supplier: APEX, TOWN OF · 83,001 people · 2024 | 2/16 | UCMR-5 |
| PFBS | 0.0040 µg/L No EPA limit set Main supplier: APEX, TOWN OF · 83,001 people · 2024 | 1/16 | UCMR-5 |
| PFHXS | 0.0035 µg/L No EPA limit set Highest in the city: MEADOW LAKE S/D · 42 people · 2025 | 1/16 | UCMR-5 |
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 Apex
| Supplier | Population served |
|---|---|
| APEX, TOWN OF | 83,001 |
| CHATHAM CO-NORTH | 23,088 |
| BLANEY FARMS S/D | 395 |
| MERION S/D | 267 |
| RIDGEBROOK BLUFF S/D | 234 |
| FELTONSVILLE COMM ORGANIZATION | 225 |
| LANGSTON ESTATES S/D | 174 |
| BELLE RIDGE S/D | 143 |
| BLUE SKIES MH LIVING | 115 |
| OAK RIDGE PARK MHP | 108 |
| SOUTH LAKE S/D | 106 |
| MYRTLEWOOD/SUMMERCREST I & II | 102 |
| OAKLYN S/D | 96 |
| COUNTRY ESTATES MHP | 60 |
| MEADOW LAKE S/D | 42 |
| BROOK MEADOW S/D | 30 |
Frequently asked questions about Apex tap water
Is Apex tap water safe to drink?
EPA testing detected 32 contaminants in the water serving Apex. 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 Apex?
16 public water suppliers report drinking-water monitoring for Apex, North Carolina to the EPA. Each is listed above with its population served.
What contaminants are in Apex's water?
The contaminants EPA monitoring detected in Apex include Nitrate, Nitrate-Nitrite, Copper, Fluoride, Barium. 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.