| canada | alberta | chironomus dilutus | species | 1 | 0 |
| canada | british columbia | chironomus dilutus | species | 17 | 0 |
| canada | manitoba | chironomus dilutus | species | 2 | 0 |
| canada | nova scotia | chironomus dilutus | species | 10 | 0 |
| canada | ontario | chironomus dilutus | species | 6 | 0 |
| canada | prince edward island | chironomus dilutus | species | 1 | 0 |
| canada | saskatchewan | chironomus dilutus | species | 32 | 0 |
| canada | saskatchewan | chironomus tentans | species | 0 | 1 |
| china | qinghai | chironomus tentans | species | 7 | 0 |
| finland | satakunta region | chironomus pallidivittatus | species | 2 | 0 |
| germany | | chironomus pallidivittatus | species | 1 | 0 |
| india | | chironomus (camptochironomus) sp. maddi-10 | species | 1 | 0 |
| norway | | chironomus tentans | species | 1 | 0 |
| russia | | chironomus setivalva | species | 2 | 0 |
| russia | novosibirsk oblast | chironomus tentans | species | 1 | 0 |
| united kingdom | | chironomus tentans | species | 2 | 0 |
| united states | | chironomus dilutus | species | 1 | 0 |
| united states | minnesota | chironomus dilutus | species | 1 | 0 |