Nitrite
Cisco
Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.
110
Samples
22
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 1.04 ppm | 4 | 4 | 0.663 ppm - 1.42 ppm |
| 2019 | 0.786 ppm | 8 | 8 | 0.260 ppm - 1.36 ppm |
| 2020 | 0.672 ppm | 17 | 17 | 0.330 ppm - 1.64 ppm |
| 2021 | 0.566 ppm | 25 | 25 | 0.140 ppm - 1.07 ppm |
| 2022 | 0.747 ppm | 29 | 29 | 0.150 ppm - 1.52 ppm |
| 2023 | 0.649 ppm | 27 | 26 | ND - 1.75 ppm |
ppm = parts per million
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 1 ppm
The legal limit for nitrite, established in 1991, was based on the rate of conversion of ingested nitrate into nitrite in adults. This limit may not fully protect against the risk of cancer due to nitrite exposure.
ppm = parts per million
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-02-05 | 18B0142-01_01 | 0.663 ppm |
| 2018-05-22 | 18E0962-01 | 1.42 ppm |
| 2018-09-05 | 18I0108-01 | 1.31 ppm |
| 2018-11-14 | 18K0442-01_01 | 0.771 ppm |
| 2019-02-20 | 19B0402-01 | 1.23 ppm |
| 2019-05-20 | 19E0649-01 | 1.10 ppm |
| 2019-09-18 | 19I0761-01 | 1.36 ppm |
| 2019-10-28 | 19J0974-01 | 0.780 ppm |
| 2019-10-28 | 19J0974-02 | 0.810 ppm |
| 2019-11-20 | 19K0604-01 | 0.260 ppm |
| 2019-11-20 | 19K0604-02 | 0.470 ppm |
| 2019-12-18 | 19L0453-01 | 0.280 ppm |
| 2020-01-20 | 20A0413-01 | 0.330 ppm |
| 2020-01-20 | 20A0413-02 | 0.560 ppm |
| 2020-02-24 | 20B0563-01 | 0.410 ppm |
| 2020-02-24 | 20B0563-02 | 0.540 ppm |
| 2020-03-18 | 20C0500-02 | 0.590 ppm |
| 2020-04-14 | 20D0220-01 | 0.590 ppm |
| 2020-04-14 | 20D0220-02 | 0.780 ppm |
| 2020-05-20 | 20E0337-01 | 0.630 ppm |
| 2020-06-17 | 20F0344-01 | 0.740 ppm |
| 2020-06-17 | 20F0344-02 | 0.380 ppm |
| 2020-09-15 | 20I0619-01 | 0.780 ppm |
| 2020-10-27 | 20J0881-02 | 1.64 ppm |
| 2020-10-29 | 20J0937-01 | 0.580 ppm |
| 2020-11-17 | 20K0423-01 | 0.690 ppm |
| 2020-11-17 | 20K0423-02 | 0.840 ppm |
| 2020-12-08 | 20L0258-01 | 0.580 ppm |
| 2020-12-08 | 20L0258-02 | 0.760 ppm |
| 2021-01-19 | 21A0339-01 | 0.460 ppm |
| 2021-01-19 | 21A0339-02 | 0.920 ppm |
| 2021-02-08 | 21B0225-01 | 0.580 ppm |
| 2021-02-08 | 21B0225-02 | 0.660 ppm |
| 2021-03-10 | 21C0410-01 | 0.630 ppm |
| 2021-03-10 | 21C0410-02 | 0.680 ppm |
| 2021-03-10 | 21C0411-01 | 0.640 ppm |
| 2021-04-19 | 21D0512-01 | 0.520 ppm |
| 2021-04-19 | 21D0512-02 | 1.000 ppm |
| 2021-05-19 | 21E0549-01 | 0.170 ppm |
| 2021-05-19 | 21E0549-02 | 0.570 ppm |
| 2021-06-14 | 21F0506-01 | 0.140 ppm |
| 2021-06-14 | 21F0506-02 | 0.660 ppm |
| 2021-07-12 | 21G0389-01 | 0.830 ppm |
| 2021-07-12 | 21G0389-02 | 0.210 ppm |
| 2021-08-16 | 21H0841-01 | 0.230 ppm |
| 2021-08-16 | 21H0841-02 | 1.07 ppm |
| 2021-09-20 | 21I0778-01 | 0.190 ppm |
| 2021-09-20 | 21I0778-02 | 0.750 ppm |
| 2021-10-11 | 21J0318-01 | 0.910 ppm |
| 2021-10-11 | 21J0318-02 | 0.210 ppm |
| 2021-11-08 | 21K0336-01 | 0.970 ppm |
| 2021-11-08 | 21K0336-02 | 0.240 ppm |
| 2021-12-13 | 21L0413-01 | 0.660 ppm |
| 2021-12-13 | 21L0413-02 | 0.240 ppm |
| 2022-01-11 | 22A0260-01 | 1.07 ppm |
| 2022-01-11 | 22A0260-02 | 0.150 ppm |
| 2022-02-21 | 22B0508-01 | 0.590 ppm |
| 2022-02-21 | 22B0508-02 | 0.180 ppm |
| 2022-03-09 | 22C0238-01 | 0.720 ppm |
| 2022-03-09 | 22C0238-02 | 0.180 ppm |
| 2022-03-09 | 22C0238-03 | 0.180 ppm |
| 2022-04-20 | 22D0524-01 | 0.850 ppm |
| 2022-04-20 | 22D0524-02 | 0.280 ppm |
| 2022-05-10 | 22E0263-01 | 0.850 ppm |
| 2022-05-10 | 22E0263-02 | 0.280 ppm |
| 2022-06-22 | 22F1206-01 | 0.800 ppm |
| 2022-06-22 | 22F1206-02 | 0.620 ppm |
| 2022-07-20 | 22G0783-01 | 1.52 ppm |
| 2022-07-20 | 22G0783-02 | 0.790 ppm |
| 2022-07-22 | 22G0875-01 | 1.03 ppm |
| 2022-08-17 | 22H0923-01 | 0.910 ppm |
| 2022-08-17 | 22H0923-02 | 1.06 ppm |
| 2022-08-23 | 22H1105-01 | 1.17 ppm |
| 2022-08-23 | 22H1105-02 | 1.19 ppm |
| 2022-09-21 | 22I0909-01 | 0.800 ppm |
| 2022-09-21 | 22I0909-02 | 1.40 ppm |
| 2022-09-26 | 22I1015-01 | 0.650 ppm |
| 2022-10-19 | 22J0941-01 | 0.940 ppm |
| 2022-10-19 | 22J0941-02 | 0.910 ppm |
| 2022-11-21 | 22K0607-01 | 1.01 ppm |
| 2022-11-21 | 22K0607-02 | 0.520 ppm |
| 2022-12-07 | 22L0191-01 | 0.470 ppm |
| 2022-12-07 | 22L0191-02 | 0.550 ppm |
| 2023-01-17 | 23A0275-01 | 1.23 ppm |
| 2023-01-17 | 23A0275-02 | 0.440 ppm |
| 2023-02-15 | 23B0512-01 | 0.560 ppm |
| 2023-02-15 | 23B0512-02 | 0.460 ppm |
| 2023-02-15 | 23B0512-03 | 0.530 ppm |
| 2023-03-15 | 23C0399-01 | 1.11 ppm |
| 2023-03-15 | 23C0399-02 | 0.270 ppm |
| 2023-04-19 | 23D0461-01 | 1.31 ppm |
| 2023-04-19 | 23D0461-02 | 0.700 ppm |
| 2023-05-22 | 23E0923-01 | 1.05 ppm |
| 2023-05-22 | 23E0923-02 | 0.650 ppm |
| 2023-06-19 | 23F0762-01 | 1.75 ppm |
| 2023-06-19 | 23F0762-02 | 1.32 ppm |
| 2023-06-22 | 23F0891-01 | 0.940 ppm |
| 2023-06-22 | 23F0891-02 | 1.02 ppm |
| 2023-07-20 | 23G0862-01 | 0.190 ppm |
| 2023-07-20 | 23G0862-02 | 0.150 ppm |
| 2023-08-22 | 23H1190-01 | ND |
| 2023-08-22 | 23H1190-02 | 0.360 ppm |
| 2023-09-25 | 23I0989-01 | 0.460 ppm |
| 2023-09-25 | 23I0989-02 | 0.430 ppm |
| 2023-10-24 | 23J0869-01 | 0.290 ppm |
| 2023-10-24 | 23J0869-02 | 0.580 ppm |
| 2023-11-15 | 23K0423-01 | 0.380 ppm |
| 2023-11-15 | 23K0423-02 | 0.400 ppm |
| 2023-12-13 | 23L0296-01 | 0.310 ppm |
| 2023-12-13 | 23L0296-02 | 0.620 ppm |