Frequent Questions

Does grandfathered data for Crypto have to include E.coli and turbidity data as well, or is Crypto only sufficient?

If a system submitting data for grandfathering has E.coli and turbidity data, it should submit it.  If a system does not have E.coli and turbidity data, they can still submit Crypto data for grandfathering.

For additional guidance on the Long Term 2 Enhanced Surface Water Treatment Rule please visit

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