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Newark water system LCR compliance sampling data: 90th percentile for lead (ppb)
| Sample year | 90th percentile for lead (ppb) | Number of samples |
|---|---|---|
| 2021 (1st) | 6.6 | 116 |
| 2020 (2nd) | 13 | 136 |
| 2020 (1st) | 13.9 | 140 |
| 2019 (2nd) | 31 | 495 |
| 2019 (1st) | 57 | 348 |
| 2018 (2nd) | 47.9 | 246 |
| 2018 (1st) | 17.8 | 129 |
| 2017 (2nd) | 26.7 | 153 |
| 2017 (1st) | 27 | 129 |
| 2015 | 10 | 52 |
| 2012 | 9 | 53 |
| 2009 | 11 | 52 |
| 2006 | 7.9 | 52 |
| 2003 | 8.3 | 57 |
| 1998 | 12.4 | 102 |
| 1992 | 26.4 | 229 |
