| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|
| #Q001 | reporting | reporting | recommended | Total PFAS Calculation Method | drinking water | Total PFAS should be calculated using the full list of substances in EPA Method 533 or EPA Method 537.1 (or both) (see Appendix A) or using a method validated by another jurisdiction that measures a minimum of 18 PFAS, such that the sum of their concentrations does not exceed 30 ng/L. | When calculating Total PFAS to compare against the proposed objective | high |
| #Q002 | reporting | reporting | guideline | Non-detect Value Assignment | drinking water | For the purposes of this proposed objective, a result of non-detect is considered to have a value of zero. | When calculating totals for the proposed objective | high |
| #Q003 | treatment | health | recommended | ALARA Principle for Treatment Plants | drinking water | For the reasons noted above, it is also recommended that treatment plants strive to maintain PFAS concentrations in drinking water as low as reasonably achievable (or ALARA). | high | |
| #Q004 | monitoring | treatment | recommended | Extended PFAS Analysis | drinking water | Where possible, utilities should strive to analyze as many PFAS as possible using validated methods to better understand the PFAS in the drinking water and better inform treatment selection. | Where possible | high |
| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Limit Type | Limit Value | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|---|---|
| #P001 | chemical | health | guideline | Total PFAS | drinking water | treatment_goal | <= 30 ng/L | Proposed objective based on the total PFAS detected in drinking water. | A result of non-detect is considered to have a value of zero. | high |
| #P002 | chemical | health | mandatory | Sum of 20 PFAS | drinking water | requirement | 100 ng/L | Directive adopted by the council of the European Union (EU, 2020). | medium | |
| #P003 | chemical | health | mandatory | Sum of all PFAS | drinking water | requirement | 500 ng/L | Directive adopted by the council of the European Union (EU, 2020). | medium | |
| #P004 | chemical | health | guideline | PFOA | drinking water | unknown | 100 ng/L | World Health Organization proposed individual provisional guideline value (WHO, 2022). | medium | |
| #P005 | chemical | health | guideline | PFOS | drinking water | unknown | 100 ng/L | World Health Organization proposed individual provisional guideline value (WHO, 2022). | medium | |
| #P006 | chemical | health | guideline | Total PFAS (WHO) | drinking water | unknown | 500 ng/L | World Health Organization combined provisional guideline value (WHO, 2022). | medium | |
| #P007 | operational | operational | mandatory | Minimum PFAS Analytes for Alternative Methods | drinking water | requirement | >= 18 substances | Requirement for using analytical methods validated by other jurisdictions for Total PFAS calculation. | Applies when EPA Method 533 or EPA Method 537.1 are not utilized. | high |
| Req ID | Category | Name | Context | Confidence |
|---|---|---|---|---|
| #D001 | PFAS | per- and polyfluoroalkyl substances | high | |
| #D002 | ALARA | as low as reasonably achievable | high | |
| #D003 | TRVs | toxicological references values | high | |
| #D004 | non-detect | considered to have a value of zero | high | |
| #D005 | total PFAS | calculated using the full list of substances in EPA Method 533 or EPA Method 537.1 (or both) (see Appendix A) or using a method validated by another jurisdiction that measures a minimum of 18 PFAS, such that the sum of their concentrations does not exceed 30 ng/L | high |