Nitrate
Concho Rural Water Grape Creek
Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 7.39 ppm | 19 | 19 | 0.373 ppm - 18.7 ppm |
| 2019 | 5.61 ppm | 20 | 20 | 0.162 ppm - 11.2 ppm |
| 2020 | 4.28 ppm | 20 | 20 | 0.162 ppm - 7.53 ppm |
| 2021 | 3.86 ppm | 20 | 20 | 0.210 ppm - 6.86 ppm |
| 2022 | 3.64 ppm | 20 | 20 | 0.232 ppm - 7.46 ppm |
| 2023 | 3.35 ppm | 20 | 20 | 0.182 ppm - 9.55 ppm |
ppm = parts per million
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.14 ppm
The EWG health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.
EPA Maximum Contaminant
Level (MCL): 10 ppm
The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.
ppm = parts per million
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-02-21 | Q1807223006 | 6.55 ppm |
| 2018-02-21 | Q1807223007 | 8.19 ppm |
| 2018-02-21 | Q1807223014 | 6.12 ppm |
| 2018-02-21 | Q1807223017 | 7.49 ppm |
| 2018-05-10 | Q1819379001 | 5.90 ppm |
| 2018-05-10 | Q1819379002 | 7.06 ppm |
| 2018-05-10 | Q1819379004 | 8.80 ppm |
| 2018-05-10 | Q1819379005 | 7.17 ppm |
| 2018-08-09 | Q1832051001 | 8.52 ppm |
| 2018-08-09 | Q1832051002 | 6.19 ppm |
| 2018-08-09 | Q1832051003 | 7.00 ppm |
| 2018-08-09 | Q1832051004 | 8.62 ppm |
| 2018-12-05 | Q1849761001 | 18.7 ppm |
| 2018-12-05 | Q1849761002 | 7.49 ppm |
| 2018-12-05 | Q1849761003 | 8.89 ppm |
| 2018-12-05 | Q1849761004 | 10.00 ppm |
| 2018-12-05 | Q1849761005 | 0.373 ppm |
| 2018-12-17 | Q1851757001 | 3.79 ppm |
| 2018-12-20 | Q1852278001 | 3.60 ppm |
| 2019-02-28 | Q1908591002 | 5.13 ppm |
| 2019-02-28 | Q1908591003 | 11.2 ppm |
| 2019-02-28 | Q1908591004 | 7.25 ppm |
| 2019-02-28 | Q1908591005 | 10.3 ppm |
| 2019-02-28 | Q1908591006 | 0.896 ppm |
| 2019-05-16 | Q1926514002 | 0.838 ppm |
| 2019-05-16 | Q1926514004 | 7.04 ppm |
| 2019-05-16 | Q1926514005 | 8.68 ppm |
| 2019-06-26 | Q1940109001 | 3.68 ppm |
| 2019-06-26 | Q1940109002 | 8.28 ppm |
| 2019-07-31 | Q1949535001 | 3.76 ppm |
| 2019-07-31 | Q1949535002 | 6.94 ppm |
| 2019-07-31 | Q1949535003 | 3.76 ppm |
| 2019-07-31 | Q1949535004 | 9.32 ppm |
| 2019-07-31 | Q1949535005 | 0.162 ppm |
| 2019-11-25 | Q1977971001 | 3.88 ppm |
| 2019-11-25 | Q1977971002 | 6.81 ppm |
| 2019-11-25 | Q1977971003 | 5.19 ppm |
| 2019-11-25 | Q1977971004 | 8.64 ppm |
| 2019-11-25 | Q1977971005 | 0.480 ppm |
| 2020-03-04 | Q2008293012 | 4.14 ppm |
| 2020-03-04 | Q2008293013 | 4.24 ppm |
| 2020-03-04 | Q2008293014 | 7.53 ppm |
| 2020-03-18 | Q2012036005 | 3.99 ppm |
| 2020-03-18 | Q2012036009 | 0.643 ppm |
| 2020-05-20 | Q2020107001 | 3.99 ppm |
| 2020-05-20 | Q2020107002 | 7.50 ppm |
| 2020-05-20 | Q2020107003 | 3.98 ppm |
| 2020-05-20 | Q2020107004 | 5.76 ppm |
| 2020-05-20 | Q2020107005 | 0.597 ppm |
| 2020-07-29 | Q2029659001 | 4.13 ppm |
| 2020-07-29 | Q2029659002 | 6.94 ppm |
| 2020-07-29 | Q2029659003 | 3.97 ppm |
| 2020-07-29 | Q2029659004 | 6.04 ppm |
| 2020-07-29 | Q2029659005 | 0.162 ppm |
| 2020-11-17 | Q2045440001 | 4.09 ppm |
| 2020-11-17 | Q2045440002 | 7.12 ppm |
| 2020-11-17 | Q2045440003 | 4.12 ppm |
| 2020-11-17 | Q2045440004 | 6.31 ppm |
| 2020-11-17 | Q2045440005 | 0.287 ppm |
| 2021-03-11 | Q2106518014 | 5.50 ppm |
| 2021-03-11 | Q2106518015 | 0.308 ppm |
| 2021-03-11 | Q2106518016 | 3.65 ppm |
| 2021-03-11 | Q2106518017 | 6.86 ppm |
| 2021-03-11 | Q2106518018 | 3.58 ppm |
| 2021-05-19 | Q2113108001 | 3.58 ppm |
| 2021-05-19 | Q2113108002 | 6.46 ppm |
| 2021-05-19 | Q2113108003 | 3.60 ppm |
| 2021-05-19 | Q2113108004 | 5.16 ppm |
| 2021-05-19 | Q2113108005 | 0.294 ppm |
| 2021-09-15 | Q2125252001 | 3.75 ppm |
| 2021-09-15 | Q2125252002 | 6.55 ppm |
| 2021-09-15 | Q2125252003 | 3.75 ppm |
| 2021-09-15 | Q2125252004 | 5.10 ppm |
| 2021-09-15 | Q2125252005 | 0.210 ppm |
| 2021-11-17 | Q2132331001 | 4.95 ppm |
| 2021-11-17 | Q2132331002 | 3.65 ppm |
| 2021-11-17 | Q2132331003 | 6.33 ppm |
| 2021-11-17 | Q2132331004 | 3.57 ppm |
| 2021-11-17 | Q2132331005 | 0.266 ppm |
| 2022-03-03 | Q2207458015 | 0.232 ppm |
| 2022-03-03 | Q2207458016 | 3.67 ppm |
| 2022-03-03 | Q2207458017 | 7.36 ppm |
| 2022-03-03 | Q2207458018 | 3.64 ppm |
| 2022-03-03 | Q2207458019 | 4.50 ppm |
| 2022-05-19 | Q2214827001 | 3.55 ppm |
| 2022-05-19 | Q2214827002 | 7.46 ppm |
| 2022-05-19 | Q2214827003 | 3.60 ppm |
| 2022-05-19 | Q2214827004 | 4.64 ppm |
| 2022-05-19 | Q2214827005 | 0.294 ppm |
| 2022-07-28 | Q2221686001 | 3.62 ppm |
| 2022-07-28 | Q2221686002 | 3.68 ppm |
| 2022-07-28 | Q2221686003 | 4.62 ppm |
| 2022-07-28 | Q2221686004 | 0.328 ppm |
| 2022-08-04 | Q2222485001 | 3.33 ppm |
| 2022-11-09 | Q2233850001 | 3.47 ppm |
| 2022-11-09 | Q2233850002 | 3.44 ppm |
| 2022-11-09 | Q2233850003 | 0.256 ppm |
| 2022-11-09 | Q2233850004 | 6.66 ppm |
| 2022-11-09 | Q2233850005 | 4.51 ppm |
| 2023-03-09 | Q2309465001 | 6.65 ppm |
| 2023-03-09 | Q2309465003 | 3.29 ppm |
| 2023-03-09 | Q2309465005 | 3.21 ppm |
| 2023-03-09 | Q2309465007 | 4.27 ppm |
| 2023-03-09 | Q2309465030 | 0.285 ppm |
| 2023-05-18 | Q2318791001 | 3.24 ppm |
| 2023-05-18 | Q2318791002 | 3.10 ppm |
| 2023-05-18 | Q2318791003 | 3.14 ppm |
| 2023-05-18 | Q2318791004 | 9.55 ppm |
| 2023-05-18 | Q2318791005 | 0.316 ppm |
| 2023-08-10 | Q2333214001 | 3.25 ppm |
| 2023-08-10 | Q2333214002 | 3.24 ppm |
| 2023-08-10 | Q2333214003 | 3.25 ppm |
| 2023-08-10 | Q2333214004 | 7.34 ppm |
| 2023-08-10 | Q2333214005 | 0.182 ppm |
| 2023-11-08 | Q2348117001 | 0.226 ppm |
| 2023-11-08 | Q2348117002 | 2.96 ppm |
| 2023-11-08 | Q2348117003 | 2.94 ppm |
| 2023-11-08 | Q2348117004 | 2.94 ppm |
| 2023-11-08 | Q2348117005 | 3.70 ppm |