| brazil | | nitratireductor aquimarinus | species | 1 | 0 |
| chile | | nitratireductor sp. zz-1 | species | 1 | 0 |
| china | | nitratireductor aquibiodomus | species | 3 | 0 |
| china | | nitratireductor aquimarinus | species | 8 | 0 |
| china | | nitratireductor indicus c115 | no rank | 1 | 0 |
| china | | nitratireductor kimnyeongensis | species | 1 | 0 |
| china | | nitratireductor sp. | species | 59 | 0 |
| china | | nitratireductor sp. 110399 | species | 2 | 0 |
| china | | nitratireductor sp. ycsc5 | species | 1 | 0 |
| china | | nitratireductor sp. zz-1 | species | 2 | 0 |
| china | | uncultured nitratireductor sp. | species | 2 | 0 |
| china | fujian | nitratireductor sp. ii-c-3 | species | 1 | 0 |
| china | guangdong | nitratireductor aquibiodomus | species | 1 | 0 |
| china | guangdong | nitratireductor aquimarinus | species | 444 | 0 |
| china | guangdong | nitratireductor pacificus | species | 38 | 0 |
| china | guangdong | nitratireductor sp. sl014b-25a2 | species | 194 | 0 |
| china | shandong | nitratireductor sp. slg310a2-16 | species | 1 | 0 |
| china | shandong | nitratireductor sp. slg310b1-11 | species | 1 | 0 |
| china | shandong | nitratireductor sp. slg310b1-34b2 | species | 1 | 0 |
| china | shandong | nitratireductor sp. slg310b2-11 | species | 1 | 0 |
| china | shandong | nitratireductor sp. slg510b6-1 | species | 1 | 0 |
| china | shandong | nitratireductor sp. slg510b6-18 | species | 2 | 0 |
| china | shandong | nitratireductor sp. slg520a5-13-2 | species | 1 | 0 |
| china | shandong | nitratireductor sp. ycsc5 | species | 1 | 0 |
| china | zhejiang | nitratireductor sp. nh89-73 | species | 1 | 0 |
| india | | nitratireductor aquibiodomus | species | 42 | 0 |
| india | | nitratireductor aquibiodomus ra22 | no rank | 96 | 0 |
| india | | nitratireductor aquimarinus | species | 1 | 0 |
| india | | nitratireductor basaltis | species | 5 | 0 |
| india | | nitratireductor kimnyeongensis | species | 55 | 0 |
| india | | nitratireductor sp. | species | 14 | 0 |
| india | | nitratireductor sp. b10 | species | 1 | 0 |
| india | | nitratireductor sp. mssrf dn77 | species | 1 | 0 |
| india | gujarat | nitratireductor sp. jc365 | species | 1 | 0 |
| india | gujarat | nitratireductor sp. kkdk-4 | species | 1 | 0 |
| india | karnataka | nitratireductor sp. prim-24 | species | 1 | 0 |
| india | kerala | nitratireductor sp. mmrf572 | species | 1 | 0 |
| india | kerala | nitratireductor sp. prim-31 | species | 1 | 0 |
| indonesia | | nitratireductor aquimarinus | species | 1 | 0 |
| iran | | nitratireductor aquibiodomus nl21 = jcm 21793 | no rank | 1 | 0 |
| iran | | nitratireductor sp. | species | 2 | 0 |
| italy | | nitratireductor aquimarinus | species | 1 | 0 |
| italy | | uncultured nitratireductor sp. | species | 1 | 0 |
| japan | | nitratireductor sp. om-1 | species | 1 | 0 |
| japan | hiroshima prefecture | nitratireductor sp. om-1 | species | 86 | 0 |
| kiribati | | nitratireductor sp. l21-pye-c39 | species | 1 | 0 |
| kuwait | | nitratireductor aquibiodomus | species | 1 | 0 |
| kuwait | | nitratireductor basaltis | species | 7 | 0 |
| kuwait | | nitratireductor sp. kmo19 | species | 1 | 0 |
| malaysia | | nitratireductor basaltis | species | 1 | 0 |
| malaysia | | nitratireductor sp. | species | 1 | 0 |
| malaysia | terengganu | nitratireductor basaltis | species | 12 | 0 |
| mexico | | nitratireductor sp. | species | 2 | 0 |
| mexico | | uncultured nitratireductor sp. | species | 1 | 0 |
| nigeria | | uncultured nitratireductor sp. | species | 1 | 0 |
| poland | | nitratireductor sp. | species | 1 | 0 |
| puerto rico | | nitratireductor sp. ws_9lb | species | 1 | 0 |
| saudi arabia | | nitratireductor sp. | species | 1 | 0 |
| saudi arabia | madinah region | nitratireductor sp. aysjsom4 | species | 1 | 0 |
| south korea | | nitratireductor basaltis | species | 2 | 0 |
| south korea | | nitratireductor sp. gj-43 | species | 1 | 0 |
| south korea | | nitratireductor sp. gj-47 | species | 1 | 0 |
| south korea | | uncultured nitratireductor sp. | species | 2 | 0 |
| south korea | jeju province | nitratireductor kimnyeongensis | species | 4 | 0 |
| taiwan | | nitratireductor sp. | species | 2 | 0 |
| tunisia | | uncultured nitratireductor sp. | species | 2 | 0 |
| tunisia | sfax governorate | uncultured nitratireductor sp. | species | 1 | 0 |
| turkey | | nitratireductor sp. | species | 1 | 0 |
| united states | new york | nitratireductor sp. | species | 1 | 0 |